organic compounds
N′-[(1E)-2-hydroxybenzylidene]benzohydrazide
of 2-(2,3-dimethylanilino)-aFaculty of Science & Engineering, School of Healthcare Science, Manchester Metropolitan University, M1 5GD, England, bChemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt, cDepartment of Chemistry, Tulane University, New Orleans, LA 70118, USA, dDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, eNational Organization for Drug Control and Research, Giza, Egypt, and fKirkuk University, College of Science, Department of Chemistry, Kirkuk, Iraq
*Correspondence e-mail: shaabankamel@yahoo.com
The 22H21N3O2, consists of two independent molecules (A and B) having differing conformations. The differences mainly concern the dihedral angles which the hydroxyphenyl and dimethylphenyl rings subtend to the central phenylene ring, these being 30.16 (6) and 58.60 (6)° in molecule A and 13.42 (7) and 60.31 (7)° in B. With the exception of the dimethyphenyl substituent, the conformations of the rest of each molecule are largely determined by intramolecular O—H⋯N and N—H⋯O hydrogen bonds. In the crystal, N—H⋯O hydrogen bonds link the molecules into chains extending parallel to the a axis in which the types of molecules alternate in an …A…B…A…B… fashion.
of the title compound, CKeywords: crystal structure; non-steroidal anti-inflammatory drugs (NSAIDs) mefenamic acid (MA); hydrazide-hydrazone compounds; hydrogen bonding.
CCDC reference: 1436917
1. Related literature
For the medicinal use of mefenamic acid (MA), see: Nawaz et al. (2007); Joo et al. (2006). For the effects of masking the free acidic group in MA and other NSAIDs, see: Arun & Ashok (2009); Tammara et al. (1994). For various biological activities of hydrazide-hydrazone compounds, see: Bedia et al. (2006); Rollas et al. (2002); Palaska et al. (2002); Rollas & Küçükgüzel (2007).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2015); cell SAINT (Bruker, 2015); data reduction: SAINT; program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009).
Supporting information
CCDC reference: 1436917
https://doi.org/10.1107/S2056989015021532/bg2574sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989015021532/bg2574Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989015021532/bg2574Isup3.cml
A mixture of equimolar ratio of Mefenamic acid hydrazide (1 mmol, 255 mg) and salicaldehyde (1 mmol, 122 mg) with catalytic amount of glacial acetic acid was refluxed for 5 h. On cooling, the precipitate was separated then collected and recrystallized from ethanol to furnish the title compound as brown crystals with m.p= 457–459 K.
H-atoms attached to carbon were placed in calculated positions (C—H = 0.95 - 0.98 Å) and included as riding contributions with isotropic displacement parameters 1.2 - 1.5 times those of the attached atoms. H-atoms attached to nitrogen and to oxygen were placed in locations derived from a difference map and refined freely. In order to adjust distances of hydrogen atoms of the NH and OH groups DFIX instruction was used with the target value of 0.85 (2) Å (O1—H1O, N2—H2N, N3—H3N, O3—H3O, N5—H5N and N6—H6N).
The antiphlogistic non-steroidal anti-inflammatory drugs (NSAIDs) mefenamic acid [2-(2,3-dimethylphenylamino)-benzoic acid], is a potent cyclo-oxygenase inhibitor (Nawaz et al., 2007). Mefenamic (MA) acid also has therapeutic potential in Alzheimer's disease (Joo et al., 2006). Masking the free carboxylic group in MA like other NSAIDs could suppress the side effect such as gastrointestinal toxicity (Arun & Ashok, 2009; Tammara et al., 1994). On other hand, hydrazide-hydrazone compounds are found to be associated with various biological activities such as antimicrobial, anti-convulsant, analgesic, anti-inflammatory, anti-platelet, anti-tubercular and anti-tumor properties (Bedia et al., 2006; Rollas et al., 2002; Palaska et al., 2002; Rollas & Küçükgüzel, 2007). Based on such facts, and as part of our ongoing study on the functionalization of (NSAIDs), we report herein the synthesis and the
of the title compound.The
of the title compound consists of two independent molecules (A and B) having differing conformations. Differences reside mainly in the dihedral angles which the hydroxyphenyl and dimethylphenyl rings make with the central phenylene ring, being 30.16 (6) and 58.60 (6)° in one of the molecules (A) and 13.42 (7) and 60.31 (7)° in the remaining one (B). With the exception of the dimethyphenyl substituent, the conformations of the rest of each molecule are largely determined by intramolecular O—H···N and N—H···O hydrogen bonds (Fig. 1 and Table 1). Intermolecular N—H···O hydrogen bonds form chains extending parallel to the a axis (Fig. 2 and Table 1) where molecules on both types alternate in a.. A···B···A···B.. fashion.For the medicinal use of mefenamic acid (MA), see: Nawaz et al. (2007); Joo et al. (2006). For the effects of masking the free acidic group in MA and other NSAIDs, see: Arun & Ashok (2009); Tammara et al. (1994). For various biological activities of hydrazide-hydrazone compounds, see: Bedia et al. (2006); Rollas et al. (2002); Palaska et al. (2002); Rollas & Küçükgüzel (2007).
Data collection: APEX2 (Bruker, 2015); cell
SAINT (Bruker, 2015); data reduction: SAINT (Bruker, 2015); program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009).Fig. 1. The asymmetric unit with labeling scheme and 50% probability ellipsoids. O—H···N and N—H···O hydrogen bonds are shown. | |
Fig. 2. The cell-packing diagram of the title compound viewed down the c axis. Symmetry codes: (a) 1 + x, y, z; (b) 2 - x, -1/2 + y, 3/2 - z. |
C22H21N3O2 | F(000) = 1520 |
Mr = 359.42 | Dx = 1.311 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 9899 reflections |
a = 10.8056 (8) Å | θ = 2.4–28.5° |
b = 14.7141 (12) Å | µ = 0.09 mm−1 |
c = 23.0408 (18) Å | T = 150 K |
β = 96.181 (1)° | Parallelepiped, brown |
V = 3642.1 (5) Å3 | 0.24 × 0.16 × 0.11 mm |
Z = 8 |
Bruker SMART APEX CCD diffractometer | 10033 independent reflections |
Radiation source: fine-focus sealed tube | 6949 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.050 |
Detector resolution: 8.3333 pixels mm-1 | θmax = 29.6°, θmin = 1.6° |
φ and ω scans | h = −14→15 |
Absorption correction: multi-scan (SADABS; Bruker, 2015) | k = −20→20 |
Tmin = 0.86, Tmax = 0.99 | l = −31→31 |
70656 measured reflections |
Refinement on F2 | 6 restraints |
Least-squares matrix: full | Hydrogen site location: mixed |
R[F2 > 2σ(F2)] = 0.047 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.133 | w = 1/[σ2(Fo2) + (0.0614P)2 + 0.5126P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.001 |
10033 reflections | Δρmax = 0.32 e Å−3 |
515 parameters | Δρmin = −0.20 e Å−3 |
C22H21N3O2 | V = 3642.1 (5) Å3 |
Mr = 359.42 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 10.8056 (8) Å | µ = 0.09 mm−1 |
b = 14.7141 (12) Å | T = 150 K |
c = 23.0408 (18) Å | 0.24 × 0.16 × 0.11 mm |
β = 96.181 (1)° |
Bruker SMART APEX CCD diffractometer | 10033 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2015) | 6949 reflections with I > 2σ(I) |
Tmin = 0.86, Tmax = 0.99 | Rint = 0.050 |
70656 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 6 restraints |
wR(F2) = 0.133 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.32 e Å−3 |
10033 reflections | Δρmin = −0.20 e Å−3 |
515 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
Refinement. Refinement on F2 for ALL reflections except those flagged by the user for potential systematic errors. Weighted R-factors wR and all goodnesses of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The observed criterion of F2 > σ(F2) is used only for calculating -R-factor-obs etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
O1 | 0.71230 (8) | 0.41170 (7) | 0.55128 (4) | 0.0340 (3) | |
O2 | 0.71178 (8) | 0.58379 (6) | 0.67590 (4) | 0.0308 (3) | |
N1 | 0.54495 (10) | 0.48567 (7) | 0.60962 (4) | 0.0251 (3) | |
N2 | 0.51064 (10) | 0.54194 (7) | 0.65258 (5) | 0.0255 (3) | |
N3 | 0.73926 (11) | 0.74914 (8) | 0.72762 (6) | 0.0365 (4) | |
C1 | 0.48962 (11) | 0.38916 (8) | 0.52842 (5) | 0.0245 (3) | |
C2 | 0.61366 (12) | 0.37317 (9) | 0.51773 (5) | 0.0270 (3) | |
C3 | 0.63844 (13) | 0.31751 (10) | 0.47176 (6) | 0.0330 (4) | |
O3 | 0.22998 (8) | 0.57785 (6) | 0.63251 (5) | 0.0340 (3) | |
C4 | 0.54195 (14) | 0.27694 (10) | 0.43666 (6) | 0.0352 (4) | |
O4 | 0.20203 (8) | 0.32974 (6) | 0.59410 (5) | 0.0357 (3) | |
C5 | 0.41977 (14) | 0.29267 (9) | 0.44609 (6) | 0.0336 (4) | |
C6 | 0.39397 (12) | 0.34867 (9) | 0.49152 (6) | 0.0293 (3) | |
C7 | 0.45795 (12) | 0.44811 (8) | 0.57523 (5) | 0.0247 (3) | |
C8 | 0.60152 (11) | 0.59197 (8) | 0.68416 (5) | 0.0245 (3) | |
C9 | 0.55567 (11) | 0.65385 (8) | 0.72794 (5) | 0.0241 (3) | |
C10 | 0.44464 (11) | 0.63492 (8) | 0.75139 (6) | 0.0271 (3) | |
C11 | 0.40069 (13) | 0.68983 (9) | 0.79312 (6) | 0.0307 (4) | |
C12 | 0.46933 (12) | 0.76582 (9) | 0.81250 (6) | 0.0312 (4) | |
C13 | 0.58055 (12) | 0.78611 (9) | 0.79129 (6) | 0.0304 (4) | |
C14 | 0.62745 (11) | 0.73073 (8) | 0.74880 (6) | 0.0263 (4) | |
C15 | 0.82217 (12) | 0.82105 (9) | 0.74591 (6) | 0.0297 (4) | |
C16 | 0.94530 (11) | 0.80069 (8) | 0.76726 (6) | 0.0256 (3) | |
C17 | 1.02858 (11) | 0.87235 (8) | 0.78144 (5) | 0.0260 (3) | |
C18 | 0.98854 (12) | 0.96196 (8) | 0.77383 (6) | 0.0294 (4) | |
C19 | 0.86683 (13) | 0.98111 (9) | 0.75292 (6) | 0.0346 (4) | |
C20 | 0.78358 (13) | 0.91125 (9) | 0.73913 (7) | 0.0351 (4) | |
C21 | 0.98772 (13) | 0.70311 (9) | 0.77297 (6) | 0.0325 (4) | |
C22 | 1.16205 (12) | 0.85380 (10) | 0.80475 (6) | 0.0335 (4) | |
N4 | 0.05545 (10) | 0.47307 (7) | 0.58508 (5) | 0.0281 (3) | |
N5 | 0.00971 (10) | 0.38778 (7) | 0.57123 (5) | 0.0304 (3) | |
N6 | 0.22941 (11) | 0.15107 (8) | 0.61035 (6) | 0.0385 (4) | |
C23 | 0.02226 (12) | 0.62982 (9) | 0.59976 (6) | 0.0293 (4) | |
C24 | 0.14408 (12) | 0.64560 (8) | 0.62567 (6) | 0.0266 (3) | |
C25 | 0.17876 (13) | 0.73246 (9) | 0.64497 (6) | 0.0320 (4) | |
C26 | 0.09406 (14) | 0.80314 (9) | 0.63855 (6) | 0.0350 (4) | |
C27 | −0.02636 (14) | 0.78881 (10) | 0.61347 (7) | 0.0410 (5) | |
C28 | −0.06137 (14) | 0.70255 (10) | 0.59448 (7) | 0.0398 (4) | |
C29 | −0.02069 (12) | 0.53978 (9) | 0.58113 (6) | 0.0324 (4) | |
C30 | 0.09011 (12) | 0.31571 (8) | 0.58057 (6) | 0.0274 (3) | |
C31 | 0.03505 (12) | 0.22381 (8) | 0.57255 (6) | 0.0280 (4) | |
C32 | −0.08981 (13) | 0.21319 (10) | 0.54979 (7) | 0.0405 (5) | |
C33 | −0.14415 (15) | 0.12908 (10) | 0.54095 (8) | 0.0483 (5) | |
C34 | −0.07282 (14) | 0.05222 (10) | 0.55509 (7) | 0.0421 (5) | |
C35 | 0.04937 (13) | 0.05954 (9) | 0.57768 (6) | 0.0364 (4) | |
C36 | 0.10719 (13) | 0.14491 (9) | 0.58750 (6) | 0.0302 (4) | |
C37 | 0.30784 (12) | 0.07592 (9) | 0.62829 (6) | 0.0307 (4) | |
C38 | 0.41823 (13) | 0.06300 (9) | 0.60272 (6) | 0.0321 (4) | |
C39 | 0.49524 (13) | −0.01087 (9) | 0.62108 (6) | 0.0331 (4) | |
C40 | 0.45940 (13) | −0.06923 (9) | 0.66372 (6) | 0.0344 (4) | |
C41 | 0.35190 (13) | −0.05417 (9) | 0.68957 (6) | 0.0347 (4) | |
C42 | 0.27609 (13) | 0.01856 (9) | 0.67221 (6) | 0.0339 (4) | |
C43 | 0.45350 (17) | 0.12825 (11) | 0.55684 (7) | 0.0479 (5) | |
C44 | 0.61826 (15) | −0.02580 (12) | 0.59715 (8) | 0.0481 (6) | |
H1O | 0.6817 (16) | 0.4431 (12) | 0.5782 (6) | 0.059 (6)* | |
H2N | 0.4343 (9) | 0.5582 (10) | 0.6517 (6) | 0.031 (4)* | |
H3 | 0.72210 | 0.30720 | 0.46430 | 0.0400* | |
H3N | 0.7699 (15) | 0.7042 (9) | 0.7096 (7) | 0.048 (5)* | |
H4 | 0.56000 | 0.23790 | 0.40580 | 0.0420* | |
H5 | 0.35390 | 0.26520 | 0.42160 | 0.0400* | |
H6 | 0.30980 | 0.35980 | 0.49780 | 0.0350* | |
H7 | 0.37320 | 0.45890 | 0.58040 | 0.0300* | |
H10 | 0.39800 | 0.58270 | 0.73820 | 0.0330* | |
H11 | 0.32470 | 0.67590 | 0.80840 | 0.0370* | |
H12 | 0.43910 | 0.80450 | 0.84090 | 0.0370* | |
H13 | 0.62620 | 0.83810 | 0.80550 | 0.0360* | |
H18 | 1.04550 | 1.01030 | 0.78310 | 0.0350* | |
H19 | 0.84030 | 1.04240 | 0.74800 | 0.0420* | |
H20 | 0.69970 | 0.92460 | 0.72500 | 0.0420* | |
H21A | 1.01680 | 0.68310 | 0.73620 | 0.0490* | |
H21B | 0.91810 | 0.66480 | 0.78190 | 0.0490* | |
H21C | 1.05580 | 0.69810 | 0.80450 | 0.0490* | |
H22A | 1.20620 | 0.91150 | 0.81210 | 0.0500* | |
H22B | 1.20240 | 0.81850 | 0.77600 | 0.0500* | |
H22C | 1.16430 | 0.81930 | 0.84120 | 0.0500* | |
H3O | 0.1931 (16) | 0.5282 (9) | 0.6200 (8) | 0.061 (6)* | |
H5N | −0.0706 (9) | 0.3809 (11) | 0.5650 (7) | 0.045 (5)* | |
H6N | 0.2625 (15) | 0.2043 (8) | 0.6108 (7) | 0.049 (5)* | |
H25 | 0.26100 | 0.74330 | 0.66260 | 0.0380* | |
H26 | 0.11900 | 0.86230 | 0.65150 | 0.0420* | |
H27 | −0.08430 | 0.83760 | 0.60930 | 0.0490* | |
H28 | −0.14420 | 0.69240 | 0.57740 | 0.0480* | |
H29 | −0.10510 | 0.53060 | 0.56610 | 0.0390* | |
H32 | −0.13850 | 0.26590 | 0.54020 | 0.0490* | |
H33 | −0.22890 | 0.12370 | 0.52540 | 0.0580* | |
H34 | −0.10920 | −0.00630 | 0.54900 | 0.0510* | |
H35 | 0.09620 | 0.00590 | 0.58690 | 0.0440* | |
H40 | 0.50980 | −0.12040 | 0.67520 | 0.0410* | |
H41 | 0.33000 | −0.09390 | 0.71930 | 0.0420* | |
H42 | 0.20240 | 0.02930 | 0.69030 | 0.0410* | |
H43A | 0.49940 | 0.17960 | 0.57580 | 0.0720* | |
H43B | 0.37800 | 0.15060 | 0.53390 | 0.0720* | |
H43C | 0.50600 | 0.09700 | 0.53100 | 0.0720* | |
H44A | 0.67550 | 0.02370 | 0.61000 | 0.0720* | |
H44B | 0.60530 | −0.02690 | 0.55440 | 0.0720* | |
H44C | 0.65390 | −0.08390 | 0.61150 | 0.0720* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0239 (5) | 0.0414 (6) | 0.0360 (5) | −0.0004 (4) | −0.0001 (4) | −0.0079 (4) |
O2 | 0.0234 (4) | 0.0294 (5) | 0.0393 (5) | −0.0001 (4) | 0.0018 (4) | −0.0064 (4) |
N1 | 0.0270 (5) | 0.0200 (5) | 0.0278 (5) | −0.0004 (4) | 0.0014 (4) | −0.0010 (4) |
N2 | 0.0220 (5) | 0.0229 (5) | 0.0312 (6) | 0.0003 (4) | 0.0013 (4) | −0.0044 (4) |
N3 | 0.0257 (6) | 0.0301 (6) | 0.0546 (8) | −0.0067 (5) | 0.0081 (5) | −0.0154 (5) |
C1 | 0.0261 (6) | 0.0215 (6) | 0.0254 (6) | −0.0014 (5) | 0.0005 (5) | 0.0023 (5) |
C2 | 0.0270 (6) | 0.0271 (6) | 0.0263 (6) | 0.0000 (5) | 0.0003 (5) | 0.0038 (5) |
C3 | 0.0329 (7) | 0.0369 (7) | 0.0293 (7) | 0.0049 (6) | 0.0040 (6) | 0.0006 (6) |
O3 | 0.0225 (4) | 0.0281 (5) | 0.0505 (6) | 0.0009 (4) | −0.0008 (4) | −0.0015 (4) |
C4 | 0.0450 (8) | 0.0338 (7) | 0.0265 (6) | 0.0025 (6) | 0.0026 (6) | −0.0026 (5) |
O4 | 0.0253 (5) | 0.0272 (5) | 0.0541 (6) | −0.0029 (4) | 0.0024 (4) | 0.0013 (4) |
C5 | 0.0388 (8) | 0.0317 (7) | 0.0288 (7) | −0.0064 (6) | −0.0026 (6) | −0.0023 (5) |
C6 | 0.0285 (6) | 0.0285 (6) | 0.0303 (6) | −0.0038 (5) | −0.0002 (5) | 0.0006 (5) |
C7 | 0.0235 (6) | 0.0223 (6) | 0.0279 (6) | −0.0014 (5) | 0.0004 (5) | 0.0012 (5) |
C8 | 0.0246 (6) | 0.0193 (5) | 0.0287 (6) | −0.0002 (5) | −0.0015 (5) | 0.0009 (5) |
C9 | 0.0231 (6) | 0.0196 (5) | 0.0284 (6) | 0.0016 (4) | −0.0025 (5) | 0.0004 (5) |
C10 | 0.0254 (6) | 0.0228 (6) | 0.0321 (6) | −0.0014 (5) | −0.0014 (5) | −0.0004 (5) |
C11 | 0.0278 (6) | 0.0278 (6) | 0.0368 (7) | 0.0009 (5) | 0.0045 (6) | −0.0001 (5) |
C12 | 0.0320 (7) | 0.0275 (6) | 0.0336 (7) | 0.0038 (5) | 0.0019 (6) | −0.0035 (5) |
C13 | 0.0293 (6) | 0.0234 (6) | 0.0370 (7) | −0.0001 (5) | −0.0034 (6) | −0.0049 (5) |
C14 | 0.0227 (6) | 0.0221 (6) | 0.0330 (7) | 0.0006 (5) | −0.0024 (5) | −0.0008 (5) |
C15 | 0.0255 (6) | 0.0264 (6) | 0.0373 (7) | −0.0047 (5) | 0.0042 (5) | −0.0067 (5) |
C16 | 0.0258 (6) | 0.0223 (6) | 0.0295 (6) | −0.0015 (5) | 0.0065 (5) | −0.0016 (5) |
C17 | 0.0247 (6) | 0.0260 (6) | 0.0279 (6) | −0.0018 (5) | 0.0058 (5) | −0.0026 (5) |
C18 | 0.0296 (7) | 0.0223 (6) | 0.0366 (7) | −0.0053 (5) | 0.0047 (5) | −0.0027 (5) |
C19 | 0.0350 (7) | 0.0222 (6) | 0.0462 (8) | 0.0015 (5) | 0.0026 (6) | 0.0001 (6) |
C20 | 0.0256 (6) | 0.0294 (7) | 0.0492 (8) | 0.0019 (5) | −0.0015 (6) | −0.0034 (6) |
C21 | 0.0339 (7) | 0.0227 (6) | 0.0421 (8) | −0.0003 (5) | 0.0091 (6) | 0.0003 (5) |
C22 | 0.0252 (6) | 0.0345 (7) | 0.0406 (8) | −0.0020 (5) | 0.0026 (6) | −0.0017 (6) |
N4 | 0.0287 (6) | 0.0216 (5) | 0.0338 (6) | −0.0015 (4) | 0.0019 (5) | −0.0009 (4) |
N5 | 0.0252 (6) | 0.0221 (5) | 0.0428 (6) | −0.0019 (4) | −0.0015 (5) | −0.0024 (5) |
N6 | 0.0308 (6) | 0.0216 (6) | 0.0602 (8) | −0.0008 (5) | −0.0077 (6) | 0.0000 (5) |
C23 | 0.0264 (6) | 0.0244 (6) | 0.0366 (7) | −0.0002 (5) | 0.0013 (5) | −0.0011 (5) |
C24 | 0.0239 (6) | 0.0263 (6) | 0.0297 (6) | −0.0012 (5) | 0.0041 (5) | 0.0013 (5) |
C25 | 0.0300 (7) | 0.0306 (7) | 0.0352 (7) | −0.0063 (5) | 0.0030 (6) | −0.0016 (6) |
C26 | 0.0404 (8) | 0.0242 (6) | 0.0405 (8) | −0.0050 (6) | 0.0054 (6) | −0.0021 (6) |
C27 | 0.0395 (8) | 0.0258 (7) | 0.0568 (9) | 0.0052 (6) | 0.0012 (7) | −0.0010 (6) |
C28 | 0.0296 (7) | 0.0303 (7) | 0.0570 (9) | 0.0036 (6) | −0.0063 (7) | −0.0039 (7) |
C29 | 0.0259 (6) | 0.0273 (6) | 0.0423 (8) | −0.0012 (5) | −0.0038 (6) | −0.0023 (6) |
C30 | 0.0276 (6) | 0.0244 (6) | 0.0303 (6) | −0.0013 (5) | 0.0037 (5) | 0.0001 (5) |
C31 | 0.0272 (6) | 0.0237 (6) | 0.0329 (7) | −0.0021 (5) | 0.0017 (5) | −0.0015 (5) |
C32 | 0.0315 (7) | 0.0287 (7) | 0.0588 (10) | −0.0009 (6) | −0.0060 (7) | 0.0020 (7) |
C33 | 0.0343 (8) | 0.0338 (8) | 0.0727 (11) | −0.0064 (6) | −0.0128 (8) | −0.0001 (8) |
C34 | 0.0412 (8) | 0.0269 (7) | 0.0563 (9) | −0.0088 (6) | −0.0040 (7) | −0.0025 (7) |
C35 | 0.0375 (8) | 0.0233 (6) | 0.0466 (8) | −0.0003 (6) | −0.0036 (6) | −0.0015 (6) |
C36 | 0.0314 (7) | 0.0253 (6) | 0.0336 (7) | −0.0020 (5) | 0.0020 (5) | −0.0012 (5) |
C37 | 0.0303 (7) | 0.0220 (6) | 0.0379 (7) | 0.0003 (5) | −0.0046 (6) | −0.0024 (5) |
C38 | 0.0367 (7) | 0.0262 (6) | 0.0323 (7) | −0.0030 (5) | −0.0012 (6) | −0.0014 (5) |
C39 | 0.0318 (7) | 0.0289 (6) | 0.0376 (7) | 0.0000 (5) | −0.0007 (6) | −0.0064 (6) |
C40 | 0.0342 (7) | 0.0229 (6) | 0.0435 (8) | −0.0009 (5) | −0.0081 (6) | −0.0014 (6) |
C41 | 0.0374 (7) | 0.0281 (7) | 0.0372 (7) | −0.0080 (6) | −0.0024 (6) | 0.0034 (6) |
C42 | 0.0318 (7) | 0.0282 (7) | 0.0411 (8) | −0.0034 (5) | 0.0017 (6) | −0.0013 (6) |
C43 | 0.0606 (11) | 0.0431 (9) | 0.0401 (8) | −0.0037 (8) | 0.0058 (8) | 0.0062 (7) |
C44 | 0.0424 (9) | 0.0501 (10) | 0.0523 (10) | 0.0064 (7) | 0.0081 (8) | −0.0063 (8) |
O1—C2 | 1.3703 (16) | C19—H19 | 0.9500 |
O2—C8 | 1.2325 (15) | C20—H20 | 0.9500 |
N1—N2 | 1.3718 (15) | C21—H21A | 0.9800 |
N1—C7 | 1.2871 (16) | C21—H21C | 0.9800 |
O1—H1O | 0.867 (16) | C21—H21B | 0.9800 |
N2—C8 | 1.3718 (16) | C22—H22A | 0.9800 |
N3—C14 | 1.3777 (17) | C22—H22C | 0.9800 |
N3—C15 | 1.4207 (18) | C22—H22B | 0.9800 |
C1—C6 | 1.3989 (18) | N5—H5N | 0.870 (10) |
C1—C7 | 1.4534 (17) | N6—H6N | 0.861 (13) |
C1—C2 | 1.4084 (18) | C23—C29 | 1.4533 (19) |
C2—C3 | 1.3876 (19) | C23—C24 | 1.4049 (19) |
N2—H2N | 0.857 (10) | C23—C28 | 1.398 (2) |
N3—H3N | 0.865 (15) | C24—C25 | 1.3913 (18) |
C3—C4 | 1.384 (2) | C25—C26 | 1.383 (2) |
O3—C24 | 1.3597 (15) | C26—C27 | 1.382 (2) |
O4—C30 | 1.2334 (16) | C27—C28 | 1.382 (2) |
C4—C5 | 1.380 (2) | C30—C31 | 1.4809 (17) |
C5—C6 | 1.3839 (19) | C31—C36 | 1.4200 (18) |
C8—C9 | 1.4831 (17) | C31—C32 | 1.403 (2) |
C9—C14 | 1.4255 (17) | C32—C33 | 1.376 (2) |
C9—C10 | 1.3959 (17) | C33—C34 | 1.388 (2) |
C10—C11 | 1.3788 (19) | C34—C35 | 1.370 (2) |
C11—C12 | 1.3887 (19) | C35—C36 | 1.4103 (19) |
C12—C13 | 1.3780 (19) | C37—C38 | 1.3991 (19) |
C13—C14 | 1.4093 (19) | C37—C42 | 1.3888 (19) |
C15—C20 | 1.3949 (19) | C38—C43 | 1.507 (2) |
C15—C16 | 1.4004 (18) | C38—C39 | 1.4061 (19) |
C16—C21 | 1.5086 (18) | C39—C40 | 1.3909 (19) |
C16—C17 | 1.4018 (17) | C39—C44 | 1.509 (2) |
C17—C22 | 1.5087 (18) | C40—C41 | 1.379 (2) |
C17—C18 | 1.3929 (17) | C41—C42 | 1.3805 (19) |
C18—C19 | 1.3801 (19) | C25—H25 | 0.9500 |
C19—C20 | 1.3803 (19) | C26—H26 | 0.9500 |
C3—H3 | 0.9500 | C27—H27 | 0.9500 |
O3—H3O | 0.867 (15) | C28—H28 | 0.9500 |
C4—H4 | 0.9500 | C29—H29 | 0.9500 |
N4—N5 | 1.3737 (15) | C32—H32 | 0.9500 |
N4—C29 | 1.2777 (17) | C33—H33 | 0.9500 |
N5—C30 | 1.3731 (16) | C34—H34 | 0.9500 |
C5—H5 | 0.9500 | C35—H35 | 0.9500 |
N6—C36 | 1.3711 (19) | C40—H40 | 0.9500 |
N6—C37 | 1.4270 (18) | C41—H41 | 0.9500 |
C6—H6 | 0.9500 | C42—H42 | 0.9500 |
C7—H7 | 0.9500 | C43—H43A | 0.9800 |
C10—H10 | 0.9500 | C43—H43B | 0.9800 |
C11—H11 | 0.9500 | C43—H43C | 0.9800 |
C12—H12 | 0.9500 | C44—H44A | 0.9800 |
C13—H13 | 0.9500 | C44—H44B | 0.9800 |
C18—H18 | 0.9500 | C44—H44C | 0.9800 |
N2—N1—C7 | 117.85 (11) | H22A—C22—H22B | 109.00 |
C2—O1—H1O | 106.9 (11) | H22A—C22—H22C | 110.00 |
N1—N2—C8 | 118.23 (10) | C17—C22—H22B | 109.00 |
C14—N3—C15 | 126.18 (12) | C17—C22—H22A | 110.00 |
C2—C1—C6 | 118.51 (11) | C30—N5—H5N | 122.6 (11) |
C2—C1—C7 | 122.28 (11) | N4—N5—H5N | 118.2 (11) |
C6—C1—C7 | 119.19 (11) | C36—N6—H6N | 116.5 (10) |
O1—C2—C1 | 121.96 (11) | C37—N6—H6N | 118.0 (10) |
O1—C2—C3 | 118.20 (12) | C24—C23—C28 | 118.55 (12) |
N1—N2—H2N | 119.1 (9) | C28—C23—C29 | 119.30 (12) |
C8—N2—H2N | 119.7 (10) | C24—C23—C29 | 122.07 (12) |
C1—C2—C3 | 119.84 (12) | O3—C24—C25 | 118.65 (12) |
C15—N3—H3N | 116.7 (10) | O3—C24—C23 | 121.65 (11) |
C14—N3—H3N | 114.5 (10) | C23—C24—C25 | 119.70 (12) |
C2—C3—C4 | 120.36 (13) | C24—C25—C26 | 120.29 (13) |
C3—C4—C5 | 120.58 (13) | C25—C26—C27 | 120.84 (13) |
C4—C5—C6 | 119.53 (13) | C26—C27—C28 | 119.07 (14) |
C1—C6—C5 | 121.16 (12) | C23—C28—C27 | 121.56 (14) |
N1—C7—C1 | 119.89 (11) | N4—C29—C23 | 119.78 (12) |
O2—C8—C9 | 124.35 (11) | O4—C30—C31 | 123.66 (11) |
N2—C8—C9 | 114.69 (10) | N5—C30—C31 | 116.54 (11) |
O2—C8—N2 | 120.96 (11) | O4—C30—N5 | 119.80 (11) |
C8—C9—C14 | 120.47 (11) | C30—C31—C36 | 120.91 (12) |
C10—C9—C14 | 119.14 (11) | C32—C31—C36 | 118.71 (12) |
C8—C9—C10 | 120.31 (11) | C30—C31—C32 | 120.38 (12) |
C9—C10—C11 | 121.87 (11) | C31—C32—C33 | 122.25 (13) |
C10—C11—C12 | 118.94 (12) | C32—C33—C34 | 118.76 (15) |
C11—C12—C13 | 121.09 (13) | C33—C34—C35 | 120.88 (14) |
C12—C13—C14 | 120.91 (12) | C34—C35—C36 | 121.54 (13) |
N3—C14—C9 | 120.18 (11) | N6—C36—C31 | 121.34 (12) |
N3—C14—C13 | 121.80 (11) | N6—C36—C35 | 120.81 (12) |
C9—C14—C13 | 118.02 (11) | C31—C36—C35 | 117.85 (12) |
C16—C15—C20 | 120.28 (12) | C38—C37—C42 | 120.86 (12) |
N3—C15—C20 | 120.27 (12) | N6—C37—C42 | 119.76 (12) |
N3—C15—C16 | 119.33 (12) | N6—C37—C38 | 119.34 (12) |
C15—C16—C21 | 120.17 (11) | C37—C38—C43 | 120.02 (13) |
C15—C16—C17 | 118.87 (11) | C37—C38—C39 | 118.83 (12) |
C17—C16—C21 | 120.94 (11) | C39—C38—C43 | 121.15 (13) |
C16—C17—C18 | 119.99 (11) | C38—C39—C40 | 119.28 (13) |
C16—C17—C22 | 120.80 (11) | C38—C39—C44 | 121.25 (13) |
C18—C17—C22 | 119.22 (11) | C40—C39—C44 | 119.44 (13) |
C17—C18—C19 | 120.57 (12) | C39—C40—C41 | 121.16 (13) |
C18—C19—C20 | 120.08 (12) | C40—C41—C42 | 120.04 (13) |
C15—C20—C19 | 120.21 (13) | C37—C42—C41 | 119.79 (13) |
C2—C3—H3 | 120.00 | C24—C25—H25 | 120.00 |
C4—C3—H3 | 120.00 | C26—C25—H25 | 120.00 |
C24—O3—H3O | 107.2 (11) | C25—C26—H26 | 120.00 |
C5—C4—H4 | 120.00 | C27—C26—H26 | 120.00 |
C3—C4—H4 | 120.00 | C26—C27—H27 | 120.00 |
N5—N4—C29 | 118.19 (11) | C28—C27—H27 | 120.00 |
C4—C5—H5 | 120.00 | C23—C28—H28 | 119.00 |
C6—C5—H5 | 120.00 | C27—C28—H28 | 119.00 |
N4—N5—C30 | 117.61 (10) | N4—C29—H29 | 120.00 |
C36—N6—C37 | 125.27 (12) | C23—C29—H29 | 120.00 |
C5—C6—H6 | 119.00 | C31—C32—H32 | 119.00 |
C1—C6—H6 | 119.00 | C33—C32—H32 | 119.00 |
N1—C7—H7 | 120.00 | C32—C33—H33 | 121.00 |
C1—C7—H7 | 120.00 | C34—C33—H33 | 121.00 |
C9—C10—H10 | 119.00 | C33—C34—H34 | 120.00 |
C11—C10—H10 | 119.00 | C35—C34—H34 | 120.00 |
C12—C11—H11 | 121.00 | C34—C35—H35 | 119.00 |
C10—C11—H11 | 121.00 | C36—C35—H35 | 119.00 |
C11—C12—H12 | 119.00 | C39—C40—H40 | 119.00 |
C13—C12—H12 | 119.00 | C41—C40—H40 | 119.00 |
C14—C13—H13 | 120.00 | C40—C41—H41 | 120.00 |
C12—C13—H13 | 120.00 | C42—C41—H41 | 120.00 |
C17—C18—H18 | 120.00 | C37—C42—H42 | 120.00 |
C19—C18—H18 | 120.00 | C41—C42—H42 | 120.00 |
C20—C19—H19 | 120.00 | C38—C43—H43A | 109.00 |
C18—C19—H19 | 120.00 | C38—C43—H43B | 109.00 |
C19—C20—H20 | 120.00 | C38—C43—H43C | 110.00 |
C15—C20—H20 | 120.00 | H43A—C43—H43B | 109.00 |
C16—C21—H21B | 109.00 | H43A—C43—H43C | 110.00 |
H21A—C21—H21C | 109.00 | H43B—C43—H43C | 109.00 |
C16—C21—H21C | 109.00 | C39—C44—H44A | 109.00 |
C16—C21—H21A | 109.00 | C39—C44—H44B | 109.00 |
H21A—C21—H21B | 109.00 | C39—C44—H44C | 109.00 |
H21B—C21—H21C | 109.00 | H44A—C44—H44B | 109.00 |
C17—C22—H22C | 109.00 | H44A—C44—H44C | 110.00 |
H22B—C22—H22C | 109.00 | H44B—C44—H44C | 109.00 |
C7—N1—N2—C8 | −171.12 (11) | C29—N4—N5—C30 | −174.36 (12) |
N2—N1—C7—C1 | 178.96 (10) | N5—N4—C29—C23 | 175.18 (12) |
N1—N2—C8—O2 | −3.03 (17) | N4—N5—C30—O4 | −8.56 (19) |
N1—N2—C8—C9 | 177.51 (10) | N4—N5—C30—C31 | 172.40 (11) |
C15—N3—C14—C9 | −177.55 (12) | C37—N6—C36—C31 | 177.96 (13) |
C15—N3—C14—C13 | 2.3 (2) | C37—N6—C36—C35 | −2.5 (2) |
C14—N3—C15—C16 | 122.74 (15) | C36—N6—C37—C38 | 121.90 (15) |
C14—N3—C15—C20 | −61.4 (2) | C36—N6—C37—C42 | −60.4 (2) |
C6—C1—C2—O1 | 178.81 (12) | C28—C23—C24—O3 | 179.60 (13) |
C6—C1—C2—C3 | −0.66 (18) | C28—C23—C24—C25 | −0.4 (2) |
C7—C1—C2—O1 | 0.62 (19) | C29—C23—C24—O3 | 2.8 (2) |
C7—C1—C2—C3 | −178.85 (12) | C29—C23—C24—C25 | −177.26 (13) |
C2—C1—C6—C5 | 1.21 (19) | C24—C23—C28—C27 | 0.7 (2) |
C7—C1—C6—C5 | 179.46 (12) | C29—C23—C28—C27 | 177.66 (14) |
C2—C1—C7—N1 | −1.99 (18) | C24—C23—C29—N4 | −4.1 (2) |
C6—C1—C7—N1 | 179.83 (12) | C28—C23—C29—N4 | 179.10 (13) |
O1—C2—C3—C4 | 179.92 (12) | O3—C24—C25—C26 | 179.76 (13) |
C1—C2—C3—C4 | −0.6 (2) | C23—C24—C25—C26 | −0.2 (2) |
C2—C3—C4—C5 | 1.3 (2) | C24—C25—C26—C27 | 0.6 (2) |
C3—C4—C5—C6 | −0.8 (2) | C25—C26—C27—C28 | −0.3 (2) |
C4—C5—C6—C1 | −0.5 (2) | C26—C27—C28—C23 | −0.4 (2) |
O2—C8—C9—C10 | −154.06 (12) | O4—C30—C31—C32 | −171.61 (14) |
O2—C8—C9—C14 | 22.71 (18) | O4—C30—C31—C36 | 8.2 (2) |
N2—C8—C9—C10 | 25.38 (16) | N5—C30—C31—C32 | 7.39 (19) |
N2—C8—C9—C14 | −157.85 (11) | N5—C30—C31—C36 | −172.78 (12) |
C8—C9—C10—C11 | 178.52 (12) | C30—C31—C32—C33 | 179.16 (15) |
C14—C9—C10—C11 | 1.71 (19) | C36—C31—C32—C33 | −0.7 (2) |
C8—C9—C14—N3 | 1.17 (18) | C30—C31—C36—N6 | 0.7 (2) |
C8—C9—C14—C13 | −178.69 (11) | C30—C31—C36—C35 | −178.83 (13) |
C10—C9—C14—N3 | 177.98 (12) | C32—C31—C36—N6 | −179.48 (14) |
C10—C9—C14—C13 | −1.89 (18) | C32—C31—C36—C35 | 1.0 (2) |
C9—C10—C11—C12 | −0.3 (2) | C31—C32—C33—C34 | 0.0 (3) |
C10—C11—C12—C13 | −0.9 (2) | C32—C33—C34—C35 | 0.3 (3) |
C11—C12—C13—C14 | 0.6 (2) | C33—C34—C35—C36 | 0.1 (2) |
C12—C13—C14—N3 | −179.10 (13) | C34—C35—C36—N6 | 179.74 (14) |
C12—C13—C14—C9 | 0.77 (19) | C34—C35—C36—C31 | −0.7 (2) |
N3—C15—C16—C17 | 175.69 (12) | N6—C37—C38—C39 | 179.50 (12) |
N3—C15—C16—C21 | −2.4 (2) | N6—C37—C38—C43 | 0.2 (2) |
C20—C15—C16—C17 | −0.2 (2) | C42—C37—C38—C39 | 1.8 (2) |
C20—C15—C16—C21 | −178.30 (13) | C42—C37—C38—C43 | −177.53 (13) |
N3—C15—C20—C19 | −175.23 (14) | N6—C37—C42—C41 | 179.98 (12) |
C16—C15—C20—C19 | 0.6 (2) | C38—C37—C42—C41 | −2.3 (2) |
C15—C16—C17—C18 | −0.44 (19) | C37—C38—C39—C40 | 0.4 (2) |
C15—C16—C17—C22 | 179.82 (12) | C37—C38—C39—C44 | −177.13 (13) |
C21—C16—C17—C18 | 177.67 (12) | C43—C38—C39—C40 | 179.73 (13) |
C21—C16—C17—C22 | −2.07 (19) | C43—C38—C39—C44 | 2.2 (2) |
C16—C17—C18—C19 | 0.65 (19) | C38—C39—C40—C41 | −2.1 (2) |
C22—C17—C18—C19 | −179.61 (12) | C44—C39—C40—C41 | 175.46 (14) |
C17—C18—C19—C20 | −0.2 (2) | C39—C40—C41—C42 | 1.6 (2) |
C18—C19—C20—C15 | −0.4 (2) | C40—C41—C42—C37 | 0.6 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O···N1 | 0.87 (2) | 1.83 (2) | 2.6048 (14) | 149 (2) |
N2—H2N···O3 | 0.86 (1) | 2.22 (1) | 3.0640 (14) | 167 (1) |
N3—H3N···O2 | 0.87 (2) | 2.01 (1) | 2.7114 (15) | 138 (1) |
O3—H3O···N4 | 0.87 (2) | 1.81 (2) | 2.5854 (14) | 149 (2) |
N5—H5N···O1i | 0.87 (1) | 2.38 (1) | 3.2164 (14) | 162 (1) |
N6—H6N···O4 | 0.86 (1) | 1.98 (1) | 2.6675 (15) | 136 (1) |
C21—H21B···N3 | 0.98 | 2.51 | 2.8556 (19) | 100 |
C32—H32···N5 | 0.95 | 2.46 | 2.8081 (18) | 102 |
C43—H43B···N6 | 0.98 | 2.51 | 2.853 (2) | 100 |
Symmetry code: (i) x−1, y, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O···N1 | 0.867 (16) | 1.825 (17) | 2.6048 (14) | 148.7 (16) |
N2—H2N···O3 | 0.857 (10) | 2.223 (10) | 3.0640 (14) | 166.8 (13) |
N3—H3N···O2 | 0.865 (15) | 2.008 (14) | 2.7114 (15) | 137.7 (14) |
O3—H3O···N4 | 0.867 (15) | 1.806 (17) | 2.5854 (14) | 148.7 (15) |
N5—H5N···O1i | 0.870 (10) | 2.377 (10) | 3.2164 (14) | 162.2 (14) |
N6—H6N···O4 | 0.861 (13) | 1.982 (13) | 2.6675 (15) | 135.8 (14) |
Symmetry code: (i) x−1, y, z. |
Acknowledgements
The support of NSF–MRI Grant No.1228232 for the purchase of the diffractometer and Tulane University for support of the Tulane Crystallography Laboratory are gratefully acknowledged.
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The antiphlogistic non-steroidal anti-inflammatory drugs (NSAIDs) mefenamic acid [2-(2,3-dimethylphenylamino)-benzoic acid], is a potent cyclo-oxygenase inhibitor (Nawaz et al., 2007). Mefenamic (MA) acid also has therapeutic potential in Alzheimer's disease (Joo et al., 2006). Masking the free carboxylic group in MA like other NSAIDs could suppress the side effect such as gastrointestinal toxicity (Arun & Ashok, 2009; Tammara et al., 1994). On other hand, hydrazide-hydrazone compounds are found to be associated with various biological activities such as antimicrobial, anti-convulsant, analgesic, anti-inflammatory, anti-platelet, anti-tubercular and anti-tumor properties (Bedia et al., 2006; Rollas et al., 2002; Palaska et al., 2002; Rollas & Küçükgüzel, 2007). Based on such facts, and as part of our ongoing study on the functionalization of (NSAIDs), we report herein the synthesis and the crystal structure of the title compound.
The asymmetric unit of the title compound consists of two independent molecules (A and B) having differing conformations. Differences reside mainly in the dihedral angles which the hydroxyphenyl and dimethylphenyl rings make with the central phenylene ring, being 30.16 (6) and 58.60 (6)° in one of the molecules (A) and 13.42 (7) and 60.31 (7)° in the remaining one (B). With the exception of the dimethyphenyl substituent, the conformations of the rest of each molecule are largely determined by intramolecular O—H···N and N—H···O hydrogen bonds (Fig. 1 and Table 1). Intermolecular N—H···O hydrogen bonds form chains extending parallel to the a axis (Fig. 2 and Table 1) where molecules on both types alternate in a.. A···B···A···B.. fashion.