organic compounds
1-Adamantylmethyl 2-aminobenzoate
aDepartment of Chemistry, Faculty of Technology, Tomas Bata University in Zlin, Nám. T. G. Masaryka 275, Zlín,762 72, Czech Republic, and bDepartment of Chemistry, Faculty of Science, Masaryk University in Brno, Kamenice 5, Brno-Bohunice, 625 00, Czech Republic
*Correspondence e-mail: rvicha@ft.utb.cz
The 18H23NO2, consists of two crystallographically independent molecules bearing an adamantane cage consisting of three fused cyclohexane rings in almost ideal chair conformations, with C—C—C angles in the range 108.47 (16)–110.59 (15)°. Both aryl rings are essentially planar, the maximum deviation from the best plane being 0.0125 (19) Å. One conformer forms chains parallel to the b axis via N—H⋯O hydrogen bonds, whereas the second exhibits only an intramolecular N—H⋯O hydrogen bond. The is stabilized by further weak N—H⋯O and N—H⋯N interactions.
of the title compound, CRelated literature
For some important biologically active compounds bearing the adamantane moiety, see: Jia et al. (2005); van der Schyf & Geldenhuys (2009). For the synthesis, see: Vícha et al. (2009).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2006); cell CrysAlis RED (Oxford Diffraction, 2006); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810047276/nk2072sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810047276/nk2072Isup2.hkl
The corresponding nitro ester - starting material for title compound preparation - was obtained by a procedure described previously (Vícha et al., 2009). The nitro ester (100 mg, 0.3 mmol) was dissolved in 5 ml of methanol and a portion of iron powder (134 mg, 2.4 mmol) was added. Concentrated hydrochloric acid (1 ml) was added into well stirred mixture. Reaction mixture was kept under reflux until starting material disappeared. The reaction mixture was poured into 5% aqueous Na2CO3 (10 ml) and extracted with mixture of hexane/diethyl ether, 2/1, v/v several times. The collected organic layers were dried over anhydrous Na2SO4 and crude product was obtained after solvent evaporation.
(petroleum ether/ethyl acetate, 8:1, v/v) yielded 71 mg (83%) of yellow crystalline powder. The single-crystal used for data collection was obtained by crystallization from chloroform at room temperature.Carbon bound hydrogen atoms were positioned geometrically and refined as riding using standard SHELXTL constraints, with their Uiso set to 1.2Ueq of their parent atoms. Nitrogen bound hydrogen atoms were located in a difference Fourier map and refined isotropically.
Adamantane is a polycyclic hydrocarbon isolated by Czech chemists from petroleum fraction in the year 1933. Owing to its high
and stability, adamantane is frequently used for the modification of compounds with known biological activity. The resulting molecules can display better pharmacodynamic and/or pharmacokinetic properties, such as SQ-109 – tuberculostatic agent derived from ethambutol (L. Jia et al. 2005) or saxagliptin – type 2 diabetes medicament (van der Schyf & Geldenhuys, 2009).The
of the title compound (Fig. 1) consists of two crystallographically independent molecules slightly varying in their geometries. Both benzene rings are essentially planar with maximum deviations from the best plane being 0.0080 (19) Å for atom C5 in the first molecule and 0.0125 (19) Å for atom C22 in the second one. The dihedral angle between the best planes of the benzene rings is 26.889 (6)°. The torsion angles describing arrangement of benzene ring, adamantane cage and C7—O8—C9 linker C18–C10–C9–O8, C10–C9–O8–C7, C6–C7–O8–C9 and C1–C6–C7–O1 are -177.40 (14), -152.23 (16), -177.92 (15) and 14.4 (3)°, respectively. The values of corresponding torsion angles for the second distinct conformer are 174.24 (14), 160.52 (15), 177.07 (15) and -9.1 (3)°, respectively. While one conformer forms chains via N—H···O H-bonds parallel to the b-axis, the second conformer exhibits only intramolecular N—H···O hydrogen bond (Fig. 2, Table 1).For some important biologically active compounds bearing the adamantane moiety, see: Jia et al. (2005); van der Schyf & Geldenhuys (2009). For the synthesis, see: Vícha et al. (2009).
Data collection: CrysAlis CCD (Oxford Diffraction, 2006); cell
CrysAlis RED (Oxford Diffraction, 2006); data reduction: CrysAlis RED (Oxford Diffraction, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. ORTEP of the asymmetric unit with atoms represented as 50% probability ellipsoids. H atoms are shown as small spheres at arbitrary radii. | |
Fig. 2. Part of the crystal structure of the title compound shows chain of one crystallographically independent conformer linked by H-bonds (dashed lines) along the b-axis. Intramolecular H-bonds N1—H1B—O1 and hydrogen atoms except for those participating in H-bonds are omitted for clarity. |
C18H23NO2 | F(000) = 2464 |
Mr = 285.37 | Dx = 1.229 Mg m−3 |
Monoclinic, C2/c | Melting point = 366–362 K |
Hall symbol: -C 2yc | Mo Kα radiation, λ = 0.71073 Å |
a = 25.8665 (19) Å | Cell parameters from 4567 reflections |
b = 6.4575 (4) Å | θ = 2.7–27.3° |
c = 38.6173 (8) Å | µ = 0.08 mm−1 |
β = 106.904 (7)° | T = 120 K |
V = 6171.7 (6) Å3 | Block, yellow |
Z = 16 | 0.40 × 0.30 × 0.30 mm |
Oxford Diffraction Xcalibur diffractometer with a Sapphire2 detector | 5431 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 2752 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.051 |
Detector resolution: 8.4353 pixels mm-1 | θmax = 25.0°, θmin = 3.2° |
ω scan | h = −30→30 |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2006) | k = −7→7 |
Tmin = 0.849, Tmax = 1.000 | l = −38→45 |
23009 measured reflections |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.061 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.015P)2] where P = (Fo2 + 2Fc2)/3 |
5431 reflections | (Δ/σ)max < 0.001 |
395 parameters | Δρmax = 0.21 e Å−3 |
0 restraints | Δρmin = −0.19 e Å−3 |
C18H23NO2 | V = 6171.7 (6) Å3 |
Mr = 285.37 | Z = 16 |
Monoclinic, C2/c | Mo Kα radiation |
a = 25.8665 (19) Å | µ = 0.08 mm−1 |
b = 6.4575 (4) Å | T = 120 K |
c = 38.6173 (8) Å | 0.40 × 0.30 × 0.30 mm |
β = 106.904 (7)° |
Oxford Diffraction Xcalibur diffractometer with a Sapphire2 detector | 5431 independent reflections |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2006) | 2752 reflections with I > 2σ(I) |
Tmin = 0.849, Tmax = 1.000 | Rint = 0.051 |
23009 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.061 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.21 e Å−3 |
5431 reflections | Δρmin = −0.19 e Å−3 |
395 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > 2σ(F2) is used only for calculating R-factors(gt) 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 | 0.27207 (5) | 0.3902 (2) | 0.21497 (4) | 0.0515 (4) | |
N1 | 0.29950 (7) | 0.0010 (4) | 0.24145 (5) | 0.0430 (5) | |
C1 | 0.33939 (7) | 0.0205 (3) | 0.22478 (5) | 0.0301 (5) | |
C2 | 0.37972 (8) | −0.1306 (3) | 0.23019 (5) | 0.0372 (5) | |
H2 | 0.3797 | −0.2432 | 0.2460 | 0.045* | |
C3 | 0.41922 (8) | −0.1190 (3) | 0.21309 (5) | 0.0422 (6) | |
H3 | 0.4464 | −0.2227 | 0.2175 | 0.051* | |
C4 | 0.42012 (8) | 0.0413 (3) | 0.18949 (5) | 0.0429 (6) | |
H4 | 0.4476 | 0.0488 | 0.1777 | 0.052* | |
C5 | 0.38052 (7) | 0.1888 (3) | 0.18354 (5) | 0.0338 (5) | |
H5 | 0.3805 | 0.2978 | 0.1670 | 0.041* | |
C6 | 0.34023 (7) | 0.1848 (3) | 0.20085 (5) | 0.0251 (5) | |
C7 | 0.30047 (8) | 0.3546 (3) | 0.19566 (5) | 0.0318 (5) | |
O8 | 0.29882 (4) | 0.4694 (2) | 0.16652 (3) | 0.0386 (4) | |
C9 | 0.26212 (7) | 0.6481 (3) | 0.15911 (5) | 0.0394 (6) | |
H9A | 0.2807 | 0.7712 | 0.1723 | 0.047* | |
H9B | 0.2300 | 0.6187 | 0.1674 | 0.047* | |
C10 | 0.24490 (7) | 0.6899 (3) | 0.11885 (5) | 0.0272 (5) | |
C11 | 0.21169 (7) | 0.5078 (3) | 0.09824 (4) | 0.0294 (5) | |
H11A | 0.2343 | 0.3814 | 0.1021 | 0.035* | |
H11B | 0.1805 | 0.4813 | 0.1076 | 0.035* | |
C12 | 0.19154 (7) | 0.5575 (3) | 0.05766 (5) | 0.0323 (5) | |
H12 | 0.1700 | 0.4379 | 0.0445 | 0.039* | |
C13 | 0.15625 (7) | 0.7498 (3) | 0.05152 (5) | 0.0380 (5) | |
H13A | 0.1244 | 0.7253 | 0.0603 | 0.046* | |
H13B | 0.1432 | 0.7813 | 0.0253 | 0.046* | |
C14 | 0.18892 (7) | 0.9333 (3) | 0.07187 (5) | 0.0350 (5) | |
H14 | 0.1656 | 1.0598 | 0.0679 | 0.042* | |
C15 | 0.23731 (7) | 0.9710 (3) | 0.05761 (5) | 0.0387 (5) | |
H15A | 0.2246 | 1.0045 | 0.0315 | 0.046* | |
H15B | 0.2586 | 1.0898 | 0.0705 | 0.046* | |
C16 | 0.27263 (7) | 0.7773 (3) | 0.06352 (5) | 0.0338 (5) | |
H16 | 0.3043 | 0.8024 | 0.0541 | 0.041* | |
C17 | 0.29290 (7) | 0.7285 (3) | 0.10409 (5) | 0.0345 (5) | |
H17A | 0.3163 | 0.6043 | 0.1081 | 0.041* | |
H17B | 0.3146 | 0.8460 | 0.1171 | 0.041* | |
C18 | 0.20872 (7) | 0.8839 (3) | 0.11237 (5) | 0.0336 (5) | |
H18A | 0.1774 | 0.8598 | 0.1217 | 0.040* | |
H18B | 0.2294 | 1.0030 | 0.1256 | 0.040* | |
C19 | 0.23996 (7) | 0.5952 (3) | 0.04336 (5) | 0.0357 (5) | |
H19A | 0.2629 | 0.4697 | 0.0470 | 0.043* | |
H19B | 0.2273 | 0.6256 | 0.0171 | 0.043* | |
O21 | 0.63002 (5) | 0.95579 (19) | 0.15600 (3) | 0.0426 (4) | |
N21 | 0.67083 (8) | 0.6087 (4) | 0.19276 (5) | 0.0466 (6) | |
C21 | 0.61810 (8) | 0.5686 (3) | 0.19077 (5) | 0.0310 (5) | |
C22 | 0.60638 (8) | 0.3934 (3) | 0.20847 (5) | 0.0376 (5) | |
H22 | 0.6347 | 0.3006 | 0.2199 | 0.045* | |
C23 | 0.55515 (9) | 0.3530 (3) | 0.20973 (5) | 0.0409 (6) | |
H23 | 0.5486 | 0.2347 | 0.2225 | 0.049* | |
C24 | 0.51230 (8) | 0.4830 (3) | 0.19257 (5) | 0.0391 (5) | |
H24 | 0.4767 | 0.4554 | 0.1936 | 0.047* | |
C25 | 0.52287 (7) | 0.6526 (3) | 0.17406 (5) | 0.0321 (5) | |
H25 | 0.4938 | 0.7398 | 0.1616 | 0.039* | |
C26 | 0.57499 (7) | 0.6995 (3) | 0.17309 (5) | 0.0255 (5) | |
C27 | 0.58532 (8) | 0.8871 (3) | 0.15428 (5) | 0.0300 (5) | |
O28 | 0.53969 (4) | 0.97894 (19) | 0.13458 (3) | 0.0327 (3) | |
C29 | 0.54562 (7) | 1.1712 (3) | 0.11641 (5) | 0.0317 (5) | |
H29A | 0.5767 | 1.1605 | 0.1064 | 0.038* | |
H29B | 0.5525 | 1.2873 | 0.1339 | 0.038* | |
C30 | 0.49414 (7) | 1.2116 (3) | 0.08609 (5) | 0.0244 (5) | |
C31 | 0.48638 (7) | 1.0487 (3) | 0.05613 (4) | 0.0301 (5) | |
H31A | 0.5183 | 1.0480 | 0.0469 | 0.036* | |
H31B | 0.4831 | 0.9098 | 0.0661 | 0.036* | |
C32 | 0.43554 (7) | 1.0966 (3) | 0.02513 (5) | 0.0310 (5) | |
H32 | 0.4308 | 0.9889 | 0.0059 | 0.037* | |
C33 | 0.38650 (7) | 1.0953 (3) | 0.03946 (5) | 0.0374 (6) | |
H33A | 0.3825 | 0.9568 | 0.0494 | 0.045* | |
H33B | 0.3535 | 1.1249 | 0.0195 | 0.045* | |
C34 | 0.39332 (7) | 1.2585 (3) | 0.06906 (5) | 0.0343 (5) | |
H34 | 0.3611 | 1.2570 | 0.0784 | 0.041* | |
C35 | 0.39899 (7) | 1.4717 (3) | 0.05345 (5) | 0.0368 (5) | |
H35A | 0.4035 | 1.5783 | 0.0725 | 0.044* | |
H35B | 0.3659 | 1.5047 | 0.0337 | 0.044* | |
C36 | 0.44816 (7) | 1.4731 (3) | 0.03881 (5) | 0.0308 (5) | |
H36 | 0.4518 | 1.6128 | 0.0286 | 0.037* | |
C37 | 0.49895 (7) | 1.4253 (3) | 0.06989 (4) | 0.0286 (5) | |
H37A | 0.5038 | 1.5326 | 0.0889 | 0.034* | |
H37B | 0.5310 | 1.4280 | 0.0608 | 0.034* | |
C38 | 0.44432 (6) | 1.2112 (3) | 0.09989 (4) | 0.0306 (5) | |
H38A | 0.4407 | 1.0740 | 0.1104 | 0.037* | |
H38B | 0.4488 | 1.3165 | 0.1192 | 0.037* | |
C39 | 0.44104 (7) | 1.3093 (3) | 0.00931 (5) | 0.0346 (5) | |
H39A | 0.4727 | 1.3104 | −0.0002 | 0.041* | |
H39B | 0.4083 | 1.3401 | −0.0109 | 0.041* | |
H1B | 0.2805 (7) | 0.125 (3) | 0.2443 (5) | 0.054 (7)* | |
H21B | 0.6966 (9) | 0.517 (3) | 0.2037 (6) | 0.094 (10)* | |
H1A | 0.3045 (8) | −0.098 (3) | 0.2590 (5) | 0.073 (9)* | |
H21A | 0.6781 (7) | 0.722 (3) | 0.1807 (5) | 0.058 (8)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0435 (9) | 0.0695 (12) | 0.0492 (10) | 0.0164 (8) | 0.0257 (8) | 0.0112 (8) |
N1 | 0.0432 (12) | 0.0529 (16) | 0.0355 (13) | −0.0100 (12) | 0.0158 (10) | 0.0053 (12) |
C1 | 0.0284 (12) | 0.0392 (14) | 0.0219 (12) | −0.0115 (11) | 0.0062 (10) | −0.0021 (11) |
C2 | 0.0480 (14) | 0.0317 (14) | 0.0287 (13) | −0.0019 (12) | 0.0061 (12) | 0.0079 (11) |
C3 | 0.0460 (14) | 0.0404 (15) | 0.0404 (14) | 0.0098 (11) | 0.0127 (12) | 0.0029 (12) |
C4 | 0.0452 (14) | 0.0486 (16) | 0.0421 (15) | 0.0107 (12) | 0.0240 (11) | 0.0114 (13) |
C5 | 0.0370 (13) | 0.0396 (15) | 0.0274 (13) | 0.0035 (11) | 0.0133 (11) | 0.0069 (11) |
C6 | 0.0211 (11) | 0.0283 (13) | 0.0240 (12) | −0.0006 (10) | 0.0035 (10) | 0.0013 (10) |
C7 | 0.0334 (13) | 0.0379 (14) | 0.0240 (13) | −0.0071 (11) | 0.0083 (11) | 0.0017 (12) |
O8 | 0.0392 (8) | 0.0427 (9) | 0.0329 (9) | 0.0116 (7) | 0.0091 (7) | 0.0055 (8) |
C9 | 0.0362 (12) | 0.0390 (14) | 0.0389 (14) | 0.0087 (11) | 0.0042 (11) | −0.0053 (11) |
C10 | 0.0303 (12) | 0.0310 (13) | 0.0191 (12) | −0.0015 (10) | 0.0051 (10) | 0.0010 (10) |
C11 | 0.0352 (11) | 0.0279 (12) | 0.0277 (12) | −0.0031 (10) | 0.0131 (9) | −0.0019 (10) |
C12 | 0.0372 (12) | 0.0319 (14) | 0.0252 (13) | −0.0100 (10) | 0.0050 (10) | −0.0052 (10) |
C13 | 0.0366 (12) | 0.0472 (15) | 0.0293 (13) | −0.0004 (12) | 0.0083 (10) | 0.0025 (12) |
C14 | 0.0384 (13) | 0.0295 (14) | 0.0361 (14) | 0.0084 (10) | 0.0092 (11) | 0.0024 (11) |
C15 | 0.0450 (13) | 0.0280 (13) | 0.0428 (14) | −0.0057 (11) | 0.0123 (11) | 0.0031 (11) |
C16 | 0.0337 (12) | 0.0318 (13) | 0.0392 (14) | −0.0045 (11) | 0.0160 (11) | 0.0013 (11) |
C17 | 0.0271 (11) | 0.0305 (13) | 0.0439 (15) | 0.0009 (10) | 0.0070 (11) | −0.0006 (11) |
C18 | 0.0416 (12) | 0.0302 (13) | 0.0296 (13) | 0.0076 (10) | 0.0114 (10) | 0.0003 (10) |
C19 | 0.0480 (13) | 0.0329 (13) | 0.0283 (13) | 0.0034 (11) | 0.0146 (11) | 0.0038 (11) |
O21 | 0.0267 (8) | 0.0497 (10) | 0.0507 (10) | −0.0001 (8) | 0.0104 (7) | 0.0114 (8) |
N21 | 0.0338 (13) | 0.0507 (15) | 0.0521 (14) | 0.0090 (12) | 0.0077 (11) | 0.0114 (12) |
C21 | 0.0349 (13) | 0.0371 (14) | 0.0206 (12) | 0.0017 (11) | 0.0077 (10) | −0.0049 (11) |
C22 | 0.0454 (14) | 0.0353 (14) | 0.0266 (13) | 0.0074 (12) | 0.0016 (11) | 0.0000 (11) |
C23 | 0.0613 (16) | 0.0279 (14) | 0.0324 (14) | −0.0001 (12) | 0.0122 (13) | 0.0038 (11) |
C24 | 0.0408 (13) | 0.0379 (14) | 0.0427 (14) | −0.0015 (12) | 0.0186 (11) | 0.0032 (12) |
C25 | 0.0354 (13) | 0.0299 (13) | 0.0298 (13) | 0.0041 (10) | 0.0073 (10) | 0.0020 (11) |
C26 | 0.0280 (12) | 0.0264 (13) | 0.0221 (12) | 0.0030 (10) | 0.0072 (10) | 0.0013 (10) |
C27 | 0.0255 (12) | 0.0394 (14) | 0.0240 (12) | 0.0069 (11) | 0.0055 (11) | −0.0005 (11) |
O28 | 0.0267 (7) | 0.0332 (9) | 0.0345 (8) | −0.0012 (7) | 0.0032 (6) | 0.0119 (7) |
C29 | 0.0330 (12) | 0.0282 (13) | 0.0311 (13) | −0.0032 (10) | 0.0049 (10) | 0.0056 (11) |
C30 | 0.0262 (11) | 0.0238 (12) | 0.0217 (12) | −0.0007 (9) | 0.0046 (10) | 0.0022 (10) |
C31 | 0.0364 (12) | 0.0224 (12) | 0.0313 (12) | −0.0003 (10) | 0.0095 (10) | 0.0026 (10) |
C32 | 0.0429 (13) | 0.0259 (13) | 0.0221 (12) | −0.0067 (10) | 0.0063 (11) | −0.0050 (10) |
C33 | 0.0316 (12) | 0.0385 (14) | 0.0341 (13) | −0.0098 (10) | −0.0030 (11) | 0.0100 (11) |
C34 | 0.0256 (12) | 0.0456 (15) | 0.0324 (13) | 0.0023 (10) | 0.0095 (10) | 0.0097 (12) |
C35 | 0.0359 (12) | 0.0401 (15) | 0.0310 (13) | 0.0075 (11) | 0.0044 (10) | 0.0030 (11) |
C36 | 0.0384 (12) | 0.0232 (12) | 0.0299 (13) | −0.0018 (10) | 0.0086 (10) | 0.0068 (11) |
C37 | 0.0327 (11) | 0.0248 (13) | 0.0272 (12) | −0.0028 (10) | 0.0071 (10) | 0.0006 (10) |
C38 | 0.0354 (12) | 0.0332 (13) | 0.0240 (12) | −0.0009 (10) | 0.0099 (10) | 0.0031 (10) |
C39 | 0.0357 (12) | 0.0363 (14) | 0.0290 (13) | −0.0015 (10) | 0.0051 (10) | 0.0043 (11) |
O1—C7 | 1.211 (2) | O21—C27 | 1.2222 (19) |
N1—C1 | 1.372 (2) | N21—C21 | 1.368 (2) |
N1—H1B | 0.961 (17) | N21—H21B | 0.90 (2) |
N1—H1A | 0.913 (19) | N21—H21A | 0.912 (18) |
C1—C2 | 1.399 (2) | C21—C22 | 1.400 (2) |
C1—C6 | 1.412 (2) | C21—C26 | 1.408 (2) |
C2—C3 | 1.370 (2) | C22—C23 | 1.365 (2) |
C2—H2 | 0.9500 | C22—H22 | 0.9500 |
C3—C4 | 1.384 (2) | C23—C24 | 1.395 (2) |
C3—H3 | 0.9500 | C23—H23 | 0.9500 |
C4—C5 | 1.368 (2) | C24—C25 | 1.378 (2) |
C4—H4 | 0.9500 | C24—H24 | 0.9500 |
C5—C6 | 1.392 (2) | C25—C26 | 1.393 (2) |
C5—H5 | 0.9500 | C25—H25 | 0.9500 |
C6—C7 | 1.476 (2) | C26—C27 | 1.476 (2) |
C7—O8 | 1.3379 (19) | C27—O28 | 1.3422 (19) |
O8—C9 | 1.4688 (18) | O28—C29 | 1.4562 (18) |
C9—C10 | 1.512 (2) | C29—C30 | 1.518 (2) |
C9—H9A | 0.9900 | C29—H29A | 0.9900 |
C9—H9B | 0.9900 | C29—H29B | 0.9900 |
C10—C17 | 1.530 (2) | C30—C38 | 1.531 (2) |
C10—C11 | 1.535 (2) | C30—C31 | 1.533 (2) |
C10—C18 | 1.540 (2) | C30—C37 | 1.535 (2) |
C11—C12 | 1.535 (2) | C31—C32 | 1.531 (2) |
C11—H11A | 0.9900 | C31—H31A | 0.9900 |
C11—H11B | 0.9900 | C31—H31B | 0.9900 |
C12—C13 | 1.519 (2) | C32—C33 | 1.524 (2) |
C12—C19 | 1.528 (2) | C32—C39 | 1.526 (2) |
C12—H12 | 1.0000 | C32—H32 | 1.0000 |
C13—C14 | 1.533 (2) | C33—C34 | 1.527 (2) |
C13—H13A | 0.9900 | C33—H33A | 0.9900 |
C13—H13B | 0.9900 | C33—H33B | 0.9900 |
C14—C15 | 1.526 (2) | C34—C35 | 1.527 (2) |
C14—C18 | 1.531 (2) | C34—C38 | 1.529 (2) |
C14—H14 | 1.0000 | C34—H34 | 1.0000 |
C15—C16 | 1.526 (2) | C35—C36 | 1.535 (2) |
C15—H15A | 0.9900 | C35—H35A | 0.9900 |
C15—H15B | 0.9900 | C35—H35B | 0.9900 |
C16—C19 | 1.523 (2) | C36—C39 | 1.526 (2) |
C16—C17 | 1.534 (2) | C36—C37 | 1.531 (2) |
C16—H16 | 1.0000 | C36—H36 | 1.0000 |
C17—H17A | 0.9900 | C37—H37A | 0.9900 |
C17—H17B | 0.9900 | C37—H37B | 0.9900 |
C18—H18A | 0.9900 | C38—H38A | 0.9900 |
C18—H18B | 0.9900 | C38—H38B | 0.9900 |
C19—H19A | 0.9900 | C39—H39A | 0.9900 |
C19—H19B | 0.9900 | C39—H39B | 0.9900 |
C1—N1—H1B | 117.1 (11) | C21—N21—H21B | 119.5 (14) |
C1—N1—H1A | 116.6 (13) | C21—N21—H21A | 118.2 (12) |
H1B—N1—H1A | 117.9 (18) | H21B—N21—H21A | 122.0 (18) |
N1—C1—C2 | 119.7 (2) | N21—C21—C22 | 118.7 (2) |
N1—C1—C6 | 122.2 (2) | N21—C21—C26 | 123.3 (2) |
C2—C1—C6 | 117.99 (18) | C22—C21—C26 | 117.94 (19) |
C3—C2—C1 | 121.22 (19) | C23—C22—C21 | 121.48 (19) |
C3—C2—H2 | 119.4 | C23—C22—H22 | 119.3 |
C1—C2—H2 | 119.4 | C21—C22—H22 | 119.3 |
C2—C3—C4 | 121.0 (2) | C22—C23—C24 | 120.88 (19) |
C2—C3—H3 | 119.5 | C22—C23—H23 | 119.6 |
C4—C3—H3 | 119.5 | C24—C23—H23 | 119.6 |
C5—C4—C3 | 118.41 (19) | C25—C24—C23 | 118.35 (18) |
C5—C4—H4 | 120.8 | C25—C24—H24 | 120.8 |
C3—C4—H4 | 120.8 | C23—C24—H24 | 120.8 |
C4—C5—C6 | 122.36 (19) | C24—C25—C26 | 121.76 (18) |
C4—C5—H5 | 118.8 | C24—C25—H25 | 119.1 |
C6—C5—H5 | 118.8 | C26—C25—H25 | 119.1 |
C5—C6—C1 | 118.95 (18) | C25—C26—C21 | 119.53 (18) |
C5—C6—C7 | 120.69 (18) | C25—C26—C27 | 120.45 (17) |
C1—C6—C7 | 120.29 (18) | C21—C26—C27 | 120.00 (18) |
O1—C7—O8 | 122.43 (19) | O21—C27—O28 | 122.17 (18) |
O1—C7—C6 | 125.50 (19) | O21—C27—C26 | 125.10 (18) |
O8—C7—C6 | 112.08 (18) | O28—C27—C26 | 112.73 (17) |
C7—O8—C9 | 117.37 (15) | C27—O28—C29 | 116.84 (14) |
O8—C9—C10 | 108.72 (15) | O28—C29—C30 | 109.06 (14) |
O8—C9—H9A | 109.9 | O28—C29—H29A | 109.9 |
C10—C9—H9A | 109.9 | C30—C29—H29A | 109.9 |
O8—C9—H9B | 109.9 | O28—C29—H29B | 109.9 |
C10—C9—H9B | 109.9 | C30—C29—H29B | 109.9 |
H9A—C9—H9B | 108.3 | H29A—C29—H29B | 108.3 |
C9—C10—C17 | 112.57 (15) | C29—C30—C38 | 111.68 (14) |
C9—C10—C11 | 110.47 (15) | C29—C30—C31 | 110.92 (14) |
C17—C10—C11 | 108.91 (15) | C38—C30—C31 | 108.83 (14) |
C9—C10—C18 | 107.19 (15) | C29—C30—C37 | 108.17 (14) |
C17—C10—C18 | 109.11 (15) | C38—C30—C37 | 108.64 (14) |
C11—C10—C18 | 108.48 (14) | C31—C30—C37 | 108.53 (14) |
C12—C11—C10 | 110.00 (14) | C32—C31—C30 | 110.24 (14) |
C12—C11—H11A | 109.7 | C32—C31—H31A | 109.6 |
C10—C11—H11A | 109.7 | C30—C31—H31A | 109.6 |
C12—C11—H11B | 109.7 | C32—C31—H31B | 109.6 |
C10—C11—H11B | 109.7 | C30—C31—H31B | 109.6 |
H11A—C11—H11B | 108.2 | H31A—C31—H31B | 108.1 |
C13—C12—C19 | 109.38 (16) | C33—C32—C39 | 109.54 (15) |
C13—C12—C11 | 109.92 (15) | C33—C32—C31 | 109.36 (15) |
C19—C12—C11 | 109.37 (14) | C39—C32—C31 | 109.63 (15) |
C13—C12—H12 | 109.4 | C33—C32—H32 | 109.4 |
C19—C12—H12 | 109.4 | C39—C32—H32 | 109.4 |
C11—C12—H12 | 109.4 | C31—C32—H32 | 109.4 |
C12—C13—C14 | 109.60 (14) | C32—C33—C34 | 109.93 (15) |
C12—C13—H13A | 109.7 | C32—C33—H33A | 109.7 |
C14—C13—H13A | 109.7 | C34—C33—H33A | 109.7 |
C12—C13—H13B | 109.7 | C32—C33—H33B | 109.7 |
C14—C13—H13B | 109.8 | C34—C33—H33B | 109.7 |
H13A—C13—H13B | 108.2 | H33A—C33—H33B | 108.2 |
C15—C14—C18 | 109.61 (15) | C33—C34—C35 | 109.28 (15) |
C15—C14—C13 | 109.02 (15) | C33—C34—C38 | 109.33 (15) |
C18—C14—C13 | 109.49 (15) | C35—C34—C38 | 109.11 (15) |
C15—C14—H14 | 109.6 | C33—C34—H34 | 109.7 |
C18—C14—H14 | 109.6 | C35—C34—H34 | 109.7 |
C13—C14—H14 | 109.6 | C38—C34—H34 | 109.7 |
C16—C15—C14 | 109.49 (15) | C34—C35—C36 | 109.62 (15) |
C16—C15—H15A | 109.8 | C34—C35—H35A | 109.7 |
C14—C15—H15A | 109.8 | C36—C35—H35A | 109.7 |
C16—C15—H15B | 109.8 | C34—C35—H35B | 109.7 |
C14—C15—H15B | 109.8 | C36—C35—H35B | 109.7 |
H15A—C15—H15B | 108.2 | H35A—C35—H35B | 108.2 |
C19—C16—C15 | 109.71 (15) | C39—C36—C37 | 109.59 (15) |
C19—C16—C17 | 109.71 (15) | C39—C36—C35 | 109.73 (15) |
C15—C16—C17 | 109.45 (15) | C37—C36—C35 | 108.90 (14) |
C19—C16—H16 | 109.3 | C39—C36—H36 | 109.5 |
C15—C16—H16 | 109.3 | C37—C36—H36 | 109.5 |
C17—C16—H16 | 109.3 | C35—C36—H36 | 109.5 |
C10—C17—C16 | 109.93 (14) | C36—C37—C30 | 110.36 (14) |
C10—C17—H17A | 109.7 | C36—C37—H37A | 109.6 |
C16—C17—H17A | 109.7 | C30—C37—H37A | 109.6 |
C10—C17—H17B | 109.7 | C36—C37—H37B | 109.6 |
C16—C17—H17B | 109.7 | C30—C37—H37B | 109.6 |
H17A—C17—H17B | 108.2 | H37A—C37—H37B | 108.1 |
C14—C18—C10 | 110.02 (14) | C34—C38—C30 | 110.57 (14) |
C14—C18—H18A | 109.7 | C34—C38—H38A | 109.5 |
C10—C18—H18A | 109.7 | C30—C38—H38A | 109.5 |
C14—C18—H18B | 109.7 | C34—C38—H38B | 109.5 |
C10—C18—H18B | 109.7 | C30—C38—H38B | 109.5 |
H18A—C18—H18B | 108.2 | H38A—C38—H38B | 108.1 |
C16—C19—C12 | 109.24 (15) | C36—C39—C32 | 109.27 (15) |
C16—C19—H19A | 109.8 | C36—C39—H39A | 109.8 |
C12—C19—H19A | 109.8 | C32—C39—H39A | 109.8 |
C16—C19—H19B | 109.8 | C36—C39—H39B | 109.8 |
C12—C19—H19B | 109.8 | C32—C39—H39B | 109.8 |
H19A—C19—H19B | 108.3 | H39A—C39—H39B | 108.3 |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···O1 | 0.961 (17) | 2.030 (18) | 2.729 (3) | 128.0 (14) |
N21—H21B···N1i | 0.90 (2) | 2.64 (2) | 3.385 (3) | 140.9 (17) |
N1—H1A···O1ii | 0.913 (19) | 2.47 (2) | 2.930 (2) | 111.4 (15) |
N1—H1A···N21iii | 0.913 (19) | 2.60 (2) | 3.511 (3) | 173.4 (17) |
N21—H21A···O21 | 0.912 (18) | 2.014 (19) | 2.698 (3) | 130.6 (16) |
N21—H21A···O1i | 0.912 (18) | 2.641 (18) | 3.097 (2) | 111.8 (14) |
Symmetry codes: (i) x+1/2, y+1/2, z; (ii) −x+1/2, y−1/2, −z+1/2; (iii) −x+1, y−1, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C18H23NO2 |
Mr | 285.37 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 120 |
a, b, c (Å) | 25.8665 (19), 6.4575 (4), 38.6173 (8) |
β (°) | 106.904 (7) |
V (Å3) | 6171.7 (6) |
Z | 16 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.40 × 0.30 × 0.30 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur diffractometer with a Sapphire2 detector |
Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2006) |
Tmin, Tmax | 0.849, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 23009, 5431, 2752 |
Rint | 0.051 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.061, 1.04 |
No. of reflections | 5431 |
No. of parameters | 395 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.21, −0.19 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2006), CrysAlis RED (Oxford Diffraction, 2006), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···O1 | 0.961 (17) | 2.030 (18) | 2.729 (3) | 128.0 (14) |
N21—H21B···N1i | 0.90 (2) | 2.64 (2) | 3.385 (3) | 140.9 (17) |
N1—H1A···O1ii | 0.913 (19) | 2.47 (2) | 2.930 (2) | 111.4 (15) |
N1—H1A···N21iii | 0.913 (19) | 2.60 (2) | 3.511 (3) | 173.4 (17) |
N21—H21A···O21 | 0.912 (18) | 2.014 (19) | 2.698 (3) | 130.6 (16) |
N21—H21A···O1i | 0.912 (18) | 2.641 (18) | 3.097 (2) | 111.8 (14) |
Symmetry codes: (i) x+1/2, y+1/2, z; (ii) −x+1/2, y−1/2, −z+1/2; (iii) −x+1, y−1, −z+1/2. |
Acknowledgements
Financial support of this work by an internal grant from TBU in Zlín (No. IGA/7/FT/10/D) funded from the resources of specific university research is gratefully acknowledged.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Adamantane is a polycyclic hydrocarbon isolated by Czech chemists from petroleum fraction in the year 1933. Owing to its high lipophilicity and stability, adamantane is frequently used for the modification of compounds with known biological activity. The resulting molecules can display better pharmacodynamic and/or pharmacokinetic properties, such as SQ-109 – tuberculostatic agent derived from ethambutol (L. Jia et al. 2005) or saxagliptin – type 2 diabetes medicament (van der Schyf & Geldenhuys, 2009).
The asymmetric unit of the title compound (Fig. 1) consists of two crystallographically independent molecules slightly varying in their geometries. Both benzene rings are essentially planar with maximum deviations from the best plane being 0.0080 (19) Å for atom C5 in the first molecule and 0.0125 (19) Å for atom C22 in the second one. The dihedral angle between the best planes of the benzene rings is 26.889 (6)°. The torsion angles describing arrangement of benzene ring, adamantane cage and C7—O8—C9 linker C18–C10–C9–O8, C10–C9–O8–C7, C6–C7–O8–C9 and C1–C6–C7–O1 are -177.40 (14), -152.23 (16), -177.92 (15) and 14.4 (3)°, respectively. The values of corresponding torsion angles for the second distinct conformer are 174.24 (14), 160.52 (15), 177.07 (15) and -9.1 (3)°, respectively. While one conformer forms chains via N—H···O H-bonds parallel to the b-axis, the second conformer exhibits only intramolecular N—H···O hydrogen bond (Fig. 2, Table 1).