organic compounds
2-Methyl-1,1-diphenyl-2-[(4S)-4-phenyl-4,5-dihydro-1,3-oxazol-2-yl]propan-1-ol
aCollege of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu Province 730070, People's Republic of China
*Correspondence e-mail: huylai@163.com
In the title compound, C25H25NO2, the phenyl ring on the 1,3-oxazole ring is disordered over two positions with occupancies of 0.600 (4) and 0.400 (4). The interplanar angle between these two disordered rings is 77.8 (2)°. There is an intramolecular O—H⋯N hydrogen bond of moderate strength. In the crystal, C—H⋯π interactions interconnect neighbouring molecules. The has been derived from the known of the reagents.
Related literature
For the synthesis and applications of oxazolines, see: Ghosh et al. (1998); Johnson & Evans (2000). For the categorization of hydrogen bonds, see: Gilli & Gilli (2009).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 2010); software used to prepare material for publication: SHELXTL and publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536813014670/fb2285sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813014670/fb2285Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813014670/fb2285Isup3.cml
Mono(oxazoline) (0.5 g, 2 mmol) dissolved in 10 ml of tetrahydrofuran was placed into a two-neck 50 ml round-bottom flask that had been previously dried and that was equipped with a magnetic stirrer and a nitrogen inlet. The solution was cooled to 273 K and phenylmagnesium bromide (1.4 g, 8 mmol) which had been dissolved in 2 ml of tetrahydrofuran was added dropwise under nitrogen atmosphere to the solution of monoxazoline in tetrahydrofuran. The reaction mixture was stirred for 2 h at the same temperature. Then thin layer
showed that the raw material had disappeared and indicated completion of the reaction. In the following step, 15 ml of saturated NH4Cl was added into the reaction solution at 273 K. The product was extracted by ethyl acetate (3×10 ml). The combined ethyl acetate extracts were dried over Na2SO4. The residue obtained after the evaporation of the solvent was purified by silica gel with petroleum ether. The crude product was dissolved in 1 ml petroleum ether and the crystals were recrystallized after 4 hours in 55% yield as white or colourless needles typically 2-3 mm long and 0.5 mm wide. Melting point: 380-381 K (determined by a X-4 digital display microscopic melting-point apparatus).The H atoms which have not been involved in the disordered phenyl rings were discernible in the difference electron density maps. The H atoms which were attached to the carbons were situated into the idealized positions and constrained using the following constraints: Caryl—Haryl = 0.93; Cmethyl—Hmethyl = 0.96; Cmethylene—Hmethylene = 0.97; Cmethine—Hmethine = 0.98 Å. UisoHaryl = 1.2UeqCaryl; UisoHmethyl = 1.5UeqCmethyl; UisoHmethylene = 1.2UeqCmethylene; UisoHmethine = 1.2UeqCmethine. The positional parameters of the hydroxyl hydrogen were freely refined while UisoHhydroxyl = 1.5UeqOhydroxyl. The occupational parameters of the disoredered phenyl rings were constrained in such a way that the their sum equalled to 1. The displacement parameters of the corresponding disordered atoms C21a, C21b ··· C25a, C25b were restrained by the command ISOR 0.01 0.02 and SIMU_* (SHELXL97, Sheldrick, 2008). In absence of significant resonant scatterers 1284 Friedel pairs have been merged by application of the command MERG 3 [SHELXL97 (Sheldrick, 2008)].
Over the last decade, C2-symmetric chiral oxazoline metal complexes have been recognized as an effective class of chiral catalyst in a variety of transition metal catalyzed asymmetric reactions. Thus, the design and synthesis of new chiral oxazoline ligands has inspired many scientists to work with great efforts (Ghosh et al., 1998, Johnson & Evans, 2000).
The title compound (Fig. 1) is a new oxazoline ligand, (S)-2-methyl-1,1-diphenyl-2-(4-phenyl-4,5-dihydrooxazol-2-yl propan-1-ol), which has been designed as a potential ligand for asymmetric catalysis. It combines diphenyl methyl units and chiral oxazoline ring together with dimethyl methyl malonate.
Fig. 2 shows the packing of the molecules in the title structure.
Peculiarity of the title
is presence of a disorder which affects one of the phenyl rings which is split into two positions: C20//C21a//C22a//C23a//C24a//C25a and C20//C21b//C22b//C23b//C24b//C25b, the respective occupations of which are 0.600 (4) and 0.400 (4). The interplanar angle of both disordered rings equals to 77.8 (2)°.There is an intramolecular hydrogen bond O2—H2···N6 of moderate strength in the structure (Tab. 1). (For categorization of the hydrogen bonds, see Gilli & Gilli, 2009.) There are present C—H···π-electron ring interactions in the structure (Tab. 1), too.
For the synthesis and applications of oxazolines, see: Ghosh et al. (1998); Johnson & Evans (2000). For the categorization of hydrogen bonds, see: Gilli & Gilli (2009).
Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 2010); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and publCIF (Westrip, 2010).Fig. 1. The title molecule with the atomic labelling scheme. The displacement ellipsoids are shown at the 50% probability level. | |
Fig. 2. Packing diagram of the title molecules viewed approximately along the a axis. |
C25H25NO2 | Dx = 1.225 Mg m−3 |
Mr = 371.46 | Melting point = 380–381 K |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 2137 reflections |
a = 9.5405 (2) Å | θ = 3.0–28.6° |
b = 10.9430 (9) Å | µ = 0.08 mm−1 |
c = 19.2901 (6) Å | T = 293 K |
V = 2013.92 (18) Å3 | Block, colourless |
Z = 4 | 0.34 × 0.07 × 0.06 mm |
F(000) = 792 |
Bruker APEXII CCD diffractometer | 2428 independent reflections |
Radiation source: fine-focus sealed tube | 2103 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.040 |
ω scans | θmax = 26.8°, θmin = 3.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | h = −12→4 |
Tmin = 0.849, Tmax = 0.977 | k = −10→13 |
5590 measured reflections | l = −24→21 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.045 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.102 | w = 1/[σ2(Fo2) + (0.0298P)2 + 0.5879P] where P = (Fo2 + 2Fc2)/3 |
S = 1.08 | (Δ/σ)max < 0.001 |
2428 reflections | Δρmax = 0.21 e Å−3 |
305 parameters | Δρmin = −0.17 e Å−3 |
338 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
114 constraints | Extinction coefficient: 0.0119 (14) |
Primary atom site location: structure-invariant direct methods |
C25H25NO2 | V = 2013.92 (18) Å3 |
Mr = 371.46 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 9.5405 (2) Å | µ = 0.08 mm−1 |
b = 10.9430 (9) Å | T = 293 K |
c = 19.2901 (6) Å | 0.34 × 0.07 × 0.06 mm |
Bruker APEXII CCD diffractometer | 2428 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 2103 reflections with I > 2σ(I) |
Tmin = 0.849, Tmax = 0.977 | Rint = 0.040 |
5590 measured reflections |
R[F2 > 2σ(F2)] = 0.045 | 338 restraints |
wR(F2) = 0.102 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | Δρmax = 0.21 e Å−3 |
2428 reflections | Δρmin = −0.17 e Å−3 |
305 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 > σ(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 | Occ. (<1) | |
O1 | 0.28330 (17) | 0.33991 (18) | 0.16867 (10) | 0.0264 (5) | |
O2 | 0.68088 (19) | 0.51237 (16) | 0.19226 (9) | 0.0183 (4) | |
H2 | 0.596 (3) | 0.533 (3) | 0.1828 (15) | 0.027* | |
C14 | 0.6840 (3) | 0.3818 (2) | 0.09158 (12) | 0.0183 (5) | |
C3 | 0.4060 (3) | 0.4020 (2) | 0.17253 (12) | 0.0176 (5) | |
C15 | 0.8082 (3) | 0.4282 (3) | 0.06375 (13) | 0.0256 (6) | |
H15 | 0.8770 | 0.4579 | 0.0935 | 0.031* | |
N6 | 0.4060 (2) | 0.5148 (2) | 0.15641 (10) | 0.0196 (5) | |
C13 | 0.8502 (3) | 0.2144 (2) | 0.17551 (13) | 0.0214 (6) | |
H13 | 0.8097 | 0.1824 | 0.1356 | 0.026* | |
C8 | 0.7957 (2) | 0.3207 (2) | 0.20445 (12) | 0.0171 (5) | |
C11 | 1.0271 (3) | 0.2014 (3) | 0.26401 (14) | 0.0266 (6) | |
H11 | 1.1042 | 0.1623 | 0.2835 | 0.032* | |
C12 | 0.9640 (3) | 0.1553 (3) | 0.20530 (13) | 0.0239 (6) | |
H12 | 0.9980 | 0.0838 | 0.1854 | 0.029* | |
C10 | 0.9738 (3) | 0.3071 (3) | 0.29357 (14) | 0.0269 (6) | |
H10 | 1.0151 | 0.3389 | 0.3334 | 0.032* | |
C19 | 0.5830 (3) | 0.3393 (3) | 0.04617 (13) | 0.0231 (6) | |
H19 | 0.4987 | 0.3090 | 0.0632 | 0.028* | |
C16 | 0.8312 (3) | 0.4309 (3) | −0.00695 (14) | 0.0343 (7) | |
H16 | 0.9148 | 0.4621 | −0.0243 | 0.041* | |
C5 | 0.6704 (2) | 0.3861 (2) | 0.17153 (12) | 0.0158 (5) | |
C17 | 0.7302 (3) | 0.3874 (3) | −0.05183 (14) | 0.0335 (7) | |
H17 | 0.7454 | 0.3890 | −0.0994 | 0.040* | |
C9 | 0.8593 (3) | 0.3661 (2) | 0.26428 (13) | 0.0213 (6) | |
H9 | 0.8245 | 0.4367 | 0.2848 | 0.026* | |
C7 | 0.5206 (3) | 0.3499 (3) | 0.28064 (12) | 0.0237 (6) | |
H7A | 0.5368 | 0.4344 | 0.2915 | 0.036* | |
H7B | 0.5902 | 0.3004 | 0.3030 | 0.036* | |
H7C | 0.4291 | 0.3265 | 0.2966 | 0.036* | |
C2 | 0.1796 (3) | 0.4270 (3) | 0.14409 (15) | 0.0298 (7) | |
H2A | 0.1033 | 0.4348 | 0.1770 | 0.036* | |
H2B | 0.1418 | 0.4018 | 0.0997 | 0.036* | |
C4 | 0.5295 (3) | 0.3314 (2) | 0.20112 (12) | 0.0169 (5) | |
C18 | 0.6074 (3) | 0.3418 (3) | −0.02570 (13) | 0.0304 (7) | |
H18 | 0.5394 | 0.3120 | −0.0558 | 0.037* | |
C1 | 0.2605 (3) | 0.5484 (3) | 0.13726 (13) | 0.0205 (6) | |
H1 | 0.2242 | 0.6061 | 0.1718 | 0.025* | |
C20 | 0.2515 (3) | 0.6070 (3) | 0.06651 (14) | 0.0282 (7) | |
C6 | 0.5148 (3) | 0.1927 (2) | 0.18810 (13) | 0.0213 (6) | |
H6A | 0.4251 | 0.1654 | 0.2046 | 0.032* | |
H6B | 0.5877 | 0.1500 | 0.2123 | 0.032* | |
H6C | 0.5223 | 0.1766 | 0.1393 | 0.032* | |
C21A | 0.2705 (6) | 0.5271 (5) | 0.0051 (2) | 0.0364 (14) | 0.600 (4) |
H21A | 0.2875 | 0.4440 | 0.0107 | 0.044* | 0.600 (4) |
C22A | 0.2626 (6) | 0.5774 (5) | −0.0610 (2) | 0.0391 (14) | 0.600 (4) |
H22A | 0.2752 | 0.5273 | −0.0994 | 0.047* | 0.600 (4) |
C23A | 0.2373 (7) | 0.6970 (6) | −0.0704 (3) | 0.0343 (15) | 0.600 (4) |
H23A | 0.2331 | 0.7297 | −0.1149 | 0.041* | 0.600 (4) |
C24A | 0.2175 (9) | 0.7703 (5) | −0.0134 (3) | 0.0521 (19) | 0.600 (4) |
H24A | 0.1997 | 0.8532 | −0.0192 | 0.062* | 0.600 (4) |
C25A | 0.2240 (7) | 0.7205 (5) | 0.0536 (3) | 0.0458 (16) | 0.600 (4) |
H25A | 0.2077 | 0.7722 | 0.0910 | 0.055* | 0.600 (4) |
C21B | 0.3699 (8) | 0.6581 (8) | 0.0362 (4) | 0.036 (2) | 0.400 (4) |
H21B | 0.4575 | 0.6488 | 0.0567 | 0.044* | 0.400 (4) |
C22B | 0.3554 (9) | 0.7233 (8) | −0.0252 (4) | 0.042 (2) | 0.400 (4) |
H22B | 0.4352 | 0.7480 | −0.0490 | 0.050* | 0.400 (4) |
C23B | 0.2253 (11) | 0.7519 (10) | −0.0514 (5) | 0.039 (3) | 0.400 (4) |
H23B | 0.2167 | 0.7919 | −0.0937 | 0.046* | 0.400 (4) |
C24B | 0.1101 (9) | 0.7207 (8) | −0.0144 (4) | 0.036 (2) | 0.400 (4) |
H24B | 0.0223 | 0.7444 | −0.0304 | 0.043* | 0.400 (4) |
C25B | 0.1192 (8) | 0.6542 (7) | 0.0469 (4) | 0.0310 (18) | 0.400 (4) |
H25B | 0.0404 | 0.6412 | 0.0743 | 0.037* | 0.400 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0155 (8) | 0.0262 (10) | 0.0375 (11) | −0.0019 (9) | −0.0028 (8) | 0.0104 (9) |
O2 | 0.0163 (8) | 0.0146 (8) | 0.0239 (9) | −0.0003 (8) | −0.0017 (8) | −0.0015 (7) |
C14 | 0.0205 (12) | 0.0155 (12) | 0.0190 (12) | 0.0054 (12) | −0.0007 (11) | 0.0015 (10) |
C3 | 0.0157 (11) | 0.0219 (13) | 0.0152 (11) | −0.0014 (12) | 0.0009 (10) | 0.0008 (10) |
C15 | 0.0225 (12) | 0.0324 (15) | 0.0219 (13) | 0.0034 (14) | −0.0003 (11) | 0.0053 (12) |
N6 | 0.0182 (10) | 0.0192 (11) | 0.0215 (11) | 0.0021 (10) | −0.0019 (9) | 0.0015 (9) |
C13 | 0.0220 (12) | 0.0245 (14) | 0.0176 (12) | 0.0033 (12) | 0.0024 (11) | 0.0019 (11) |
C8 | 0.0173 (11) | 0.0181 (12) | 0.0158 (11) | −0.0014 (11) | 0.0004 (10) | 0.0024 (10) |
C11 | 0.0166 (11) | 0.0316 (16) | 0.0315 (14) | −0.0022 (14) | −0.0026 (12) | 0.0128 (13) |
C12 | 0.0235 (12) | 0.0234 (13) | 0.0249 (13) | 0.0060 (13) | 0.0031 (11) | 0.0046 (12) |
C10 | 0.0247 (12) | 0.0291 (15) | 0.0270 (13) | −0.0044 (14) | −0.0074 (12) | 0.0032 (12) |
C19 | 0.0263 (13) | 0.0235 (14) | 0.0197 (12) | 0.0000 (13) | −0.0006 (11) | −0.0004 (11) |
C16 | 0.0277 (14) | 0.0450 (19) | 0.0302 (15) | 0.0087 (16) | 0.0110 (13) | 0.0124 (14) |
C5 | 0.0165 (11) | 0.0128 (11) | 0.0179 (11) | −0.0007 (11) | −0.0013 (10) | −0.0006 (10) |
C17 | 0.0447 (17) | 0.0420 (18) | 0.0138 (13) | 0.0139 (16) | 0.0081 (13) | 0.0005 (12) |
C9 | 0.0212 (12) | 0.0198 (13) | 0.0228 (13) | −0.0023 (11) | −0.0019 (11) | −0.0003 (11) |
C7 | 0.0245 (12) | 0.0286 (15) | 0.0181 (12) | 0.0015 (14) | 0.0019 (11) | 0.0044 (11) |
C2 | 0.0168 (12) | 0.0322 (16) | 0.0403 (16) | 0.0020 (14) | −0.0066 (12) | 0.0118 (14) |
C4 | 0.0170 (11) | 0.0153 (12) | 0.0184 (12) | −0.0004 (12) | 0.0000 (10) | 0.0009 (11) |
C18 | 0.0395 (15) | 0.0332 (16) | 0.0187 (13) | 0.0070 (16) | −0.0034 (12) | −0.0055 (12) |
C1 | 0.0164 (11) | 0.0239 (14) | 0.0212 (13) | 0.0029 (12) | 0.0030 (10) | 0.0025 (11) |
C20 | 0.0180 (12) | 0.0408 (18) | 0.0257 (14) | 0.0023 (14) | −0.0024 (11) | 0.0094 (13) |
C6 | 0.0211 (12) | 0.0183 (13) | 0.0244 (13) | −0.0014 (12) | −0.0031 (11) | 0.0011 (11) |
C21A | 0.055 (3) | 0.032 (3) | 0.022 (2) | 0.016 (3) | −0.005 (2) | −0.005 (2) |
C22A | 0.053 (3) | 0.043 (3) | 0.021 (2) | 0.010 (3) | −0.002 (2) | −0.003 (2) |
C23A | 0.040 (3) | 0.046 (4) | 0.017 (3) | −0.003 (3) | −0.006 (2) | 0.005 (3) |
C24A | 0.098 (5) | 0.024 (3) | 0.035 (3) | −0.004 (4) | −0.008 (4) | 0.009 (3) |
C25A | 0.085 (4) | 0.029 (3) | 0.023 (2) | −0.002 (3) | −0.005 (3) | −0.002 (2) |
C21B | 0.034 (4) | 0.045 (4) | 0.029 (4) | −0.004 (4) | 0.001 (3) | 0.011 (4) |
C22B | 0.049 (4) | 0.048 (5) | 0.029 (4) | −0.013 (4) | −0.001 (4) | 0.016 (4) |
C23B | 0.062 (5) | 0.041 (6) | 0.013 (4) | 0.004 (5) | 0.007 (4) | 0.007 (4) |
C24B | 0.039 (4) | 0.037 (4) | 0.033 (4) | 0.010 (4) | −0.006 (3) | 0.017 (3) |
C25B | 0.031 (3) | 0.036 (4) | 0.027 (3) | −0.003 (4) | −0.006 (3) | 0.001 (3) |
O1—C3 | 1.355 (3) | C7—H7C | 0.9600 |
O1—C2 | 1.453 (3) | C2—C1 | 1.542 (4) |
O2—C5 | 1.442 (3) | C2—H2A | 0.9700 |
O2—H2 | 0.86 (3) | C2—H2B | 0.9700 |
C14—C19 | 1.383 (4) | C4—C6 | 1.545 (3) |
C14—C15 | 1.396 (4) | C18—H18 | 0.9300 |
C14—C5 | 1.548 (3) | C1—C20 | 1.510 (4) |
C3—N6 | 1.274 (3) | C1—H1 | 0.9800 |
C3—C4 | 1.513 (3) | C20—C25A | 1.293 (6) |
C15—C16 | 1.382 (4) | C20—C21B | 1.390 (8) |
C15—H15 | 0.9300 | C20—C25B | 1.415 (7) |
N6—C1 | 1.483 (3) | C20—C21A | 1.483 (5) |
C13—C12 | 1.388 (4) | C6—H6A | 0.9600 |
C13—C8 | 1.391 (4) | C6—H6B | 0.9600 |
C13—H13 | 0.9300 | C6—H6C | 0.9600 |
C8—C9 | 1.395 (3) | C21A—C22A | 1.391 (6) |
C8—C5 | 1.531 (3) | C21A—H21A | 0.9300 |
C11—C12 | 1.379 (4) | C22A—C23A | 1.343 (8) |
C11—C10 | 1.387 (4) | C22A—H22A | 0.9300 |
C11—H11 | 0.9300 | C23A—C24A | 1.375 (8) |
C12—H12 | 0.9300 | C23A—H23A | 0.9300 |
C10—C9 | 1.389 (4) | C24A—C25A | 1.403 (7) |
C10—H10 | 0.9300 | C24A—H24A | 0.9300 |
C19—C18 | 1.406 (4) | C25A—H25A | 0.9300 |
C19—H19 | 0.9300 | C21B—C22B | 1.389 (9) |
C16—C17 | 1.380 (4) | C21B—H21B | 0.9300 |
C16—H16 | 0.9300 | C22B—C23B | 1.377 (12) |
C5—C4 | 1.578 (3) | C22B—H22B | 0.9300 |
C17—C18 | 1.370 (4) | C23B—C24B | 1.355 (11) |
C17—H17 | 0.9300 | C23B—H23B | 0.9300 |
C9—H9 | 0.9300 | C24B—C25B | 1.391 (9) |
C7—C4 | 1.549 (3) | C24B—H24B | 0.9300 |
C7—H7A | 0.9600 | C25B—H25B | 0.9300 |
C7—H7B | 0.9600 | ||
C3—O1—C2 | 106.09 (19) | C6—C4—C7 | 106.5 (2) |
C5—O2—H2 | 98 (2) | C3—C4—C5 | 109.78 (19) |
C19—C14—C15 | 118.0 (2) | C6—C4—C5 | 113.0 (2) |
C19—C14—C5 | 125.6 (2) | C7—C4—C5 | 110.8 (2) |
C15—C14—C5 | 116.3 (2) | C17—C18—C19 | 120.8 (3) |
N6—C3—O1 | 118.2 (2) | C17—C18—H18 | 119.6 |
N6—C3—C4 | 125.7 (2) | C19—C18—H18 | 119.6 |
O1—C3—C4 | 115.9 (2) | N6—C1—C20 | 112.5 (2) |
C16—C15—C14 | 121.5 (3) | N6—C1—C2 | 103.5 (2) |
C16—C15—H15 | 119.3 | C20—C1—C2 | 114.5 (2) |
C14—C15—H15 | 119.3 | N6—C1—H1 | 108.7 |
C3—N6—C1 | 107.5 (2) | C20—C1—H1 | 108.7 |
C12—C13—C8 | 121.0 (2) | C2—C1—H1 | 108.7 |
C12—C13—H13 | 119.5 | C25A—C20—C21B | 72.4 (5) |
C8—C13—H13 | 119.5 | C25A—C20—C25B | 54.4 (4) |
C13—C8—C9 | 117.8 (2) | C21B—C20—C25B | 117.8 (4) |
C13—C8—C5 | 121.1 (2) | C25A—C20—C21A | 115.9 (4) |
C9—C8—C5 | 121.1 (2) | C21B—C20—C21A | 78.6 (4) |
C12—C11—C10 | 118.9 (2) | C25B—C20—C21A | 96.3 (4) |
C12—C11—H11 | 120.6 | C25A—C20—C1 | 126.4 (3) |
C10—C11—H11 | 120.6 | C21B—C20—C1 | 120.3 (4) |
C11—C12—C13 | 120.8 (3) | C25B—C20—C1 | 116.6 (4) |
C11—C12—H12 | 119.6 | C21A—C20—C1 | 117.7 (3) |
C13—C12—H12 | 119.6 | C4—C6—H6A | 109.5 |
C11—C10—C9 | 120.6 (3) | C4—C6—H6B | 109.5 |
C11—C10—H10 | 119.7 | H6A—C6—H6B | 109.5 |
C9—C10—H10 | 119.7 | C4—C6—H6C | 109.5 |
C14—C19—C18 | 120.2 (3) | H6A—C6—H6C | 109.5 |
C14—C19—H19 | 119.9 | H6B—C6—H6C | 109.5 |
C18—C19—H19 | 119.9 | C22A—C21A—C20 | 119.5 (4) |
C17—C16—C15 | 120.0 (3) | C22A—C21A—H21A | 120.2 |
C17—C16—H16 | 120.0 | C20—C21A—H21A | 120.2 |
C15—C16—H16 | 120.0 | C23A—C22A—C21A | 121.3 (5) |
O2—C5—C8 | 106.15 (19) | C23A—C22A—H22A | 119.4 |
O2—C5—C14 | 107.39 (19) | C21A—C22A—H22A | 119.4 |
C8—C5—C14 | 109.5 (2) | C22A—C23A—C24A | 119.0 (5) |
O2—C5—C4 | 108.78 (19) | C22A—C23A—H23A | 120.5 |
C8—C5—C4 | 109.78 (18) | C24A—C23A—H23A | 120.5 |
C14—C5—C4 | 114.86 (19) | C23A—C24A—C25A | 120.3 (5) |
C18—C17—C16 | 119.5 (2) | C23A—C24A—H24A | 119.9 |
C18—C17—H17 | 120.3 | C25A—C24A—H24A | 119.9 |
C16—C17—H17 | 120.3 | C20—C25A—C24A | 124.0 (5) |
C10—C9—C8 | 120.9 (2) | C20—C25A—H25A | 118.0 |
C10—C9—H9 | 119.5 | C24A—C25A—H25A | 118.0 |
C8—C9—H9 | 119.5 | C22B—C21B—C20 | 118.9 (6) |
C4—C7—H7A | 109.5 | C22B—C21B—H21B | 120.5 |
C4—C7—H7B | 109.5 | C20—C21B—H21B | 120.5 |
H7A—C7—H7B | 109.5 | C23B—C22B—C21B | 121.4 (7) |
C4—C7—H7C | 109.5 | C23B—C22B—H22B | 119.3 |
H7A—C7—H7C | 109.5 | C21B—C22B—H22B | 119.3 |
H7B—C7—H7C | 109.5 | C24B—C23B—C22B | 118.7 (8) |
O1—C2—C1 | 104.63 (19) | C24B—C23B—H23B | 120.7 |
O1—C2—H2A | 110.8 | C22B—C23B—H23B | 120.7 |
C1—C2—H2A | 110.8 | C23B—C24B—C25B | 122.0 (8) |
O1—C2—H2B | 110.8 | C23B—C24B—H24B | 119.0 |
C1—C2—H2B | 110.8 | C25B—C24B—H24B | 119.0 |
H2A—C2—H2B | 108.9 | C24B—C25B—C20 | 118.3 (6) |
C3—C4—C6 | 111.8 (2) | C24B—C25B—H25B | 120.9 |
C3—C4—C7 | 104.6 (2) | C20—C25B—H25B | 120.9 |
C2—O1—C3—N6 | 1.0 (3) | C14—C5—C4—C6 | 65.4 (3) |
C2—O1—C3—C4 | 176.6 (2) | O2—C5—C4—C7 | −54.8 (3) |
C19—C14—C15—C16 | −0.6 (4) | C8—C5—C4—C7 | 61.0 (3) |
C5—C14—C15—C16 | −179.0 (3) | C14—C5—C4—C7 | −175.2 (2) |
O1—C3—N6—C1 | 0.6 (3) | C16—C17—C18—C19 | 0.3 (5) |
C4—C3—N6—C1 | −174.6 (2) | C14—C19—C18—C17 | −0.8 (4) |
C12—C13—C8—C9 | 0.1 (4) | C3—N6—C1—C20 | −125.9 (2) |
C12—C13—C8—C5 | 179.9 (2) | C3—N6—C1—C2 | −1.8 (3) |
C10—C11—C12—C13 | 0.9 (4) | O1—C2—C1—N6 | 2.3 (3) |
C8—C13—C12—C11 | −0.8 (4) | O1—C2—C1—C20 | 125.2 (2) |
C12—C11—C10—C9 | −0.4 (4) | N6—C1—C20—C25A | −109.5 (5) |
C15—C14—C19—C18 | 0.9 (4) | C2—C1—C20—C25A | 132.7 (5) |
C5—C14—C19—C18 | 179.2 (3) | N6—C1—C20—C21B | −19.8 (5) |
C14—C15—C16—C17 | 0.1 (5) | C2—C1—C20—C21B | −137.6 (5) |
C13—C8—C5—O2 | −154.6 (2) | N6—C1—C20—C25B | −173.3 (4) |
C9—C8—C5—O2 | 25.2 (3) | C2—C1—C20—C25B | 68.9 (5) |
C13—C8—C5—C14 | −38.9 (3) | N6—C1—C20—C21A | 72.9 (4) |
C9—C8—C5—C14 | 140.8 (2) | C2—C1—C20—C21A | −44.9 (4) |
C13—C8—C5—C4 | 88.0 (3) | C25A—C20—C21A—C22A | 2.0 (7) |
C9—C8—C5—C4 | −92.2 (3) | C21B—C20—C21A—C22A | −61.8 (6) |
C19—C14—C5—O2 | −118.7 (3) | C25B—C20—C21A—C22A | 55.3 (6) |
C15—C14—C5—O2 | 59.6 (3) | C1—C20—C21A—C22A | 179.9 (4) |
C19—C14—C5—C8 | 126.5 (3) | C20—C21A—C22A—C23A | −0.4 (9) |
C15—C14—C5—C8 | −55.2 (3) | C21A—C22A—C23A—C24A | −0.6 (10) |
C19—C14—C5—C4 | 2.4 (4) | C22A—C23A—C24A—C25A | 0.1 (12) |
C15—C14—C5—C4 | −179.3 (2) | C21B—C20—C25A—C24A | 64.7 (8) |
C15—C16—C17—C18 | 0.1 (5) | C25B—C20—C25A—C24A | −81.3 (8) |
C11—C10—C9—C8 | −0.3 (4) | C21A—C20—C25A—C24A | −2.6 (9) |
C13—C8—C9—C10 | 0.4 (4) | C1—C20—C25A—C24A | 179.8 (6) |
C5—C8—C9—C10 | −179.4 (2) | C23A—C24A—C25A—C20 | 1.7 (12) |
C3—O1—C2—C1 | −2.1 (3) | C25A—C20—C21B—C22B | −50.5 (7) |
N6—C3—C4—C6 | −157.5 (2) | C25B—C20—C21B—C22B | −19.6 (10) |
O1—C3—C4—C6 | 27.3 (3) | C21A—C20—C21B—C22B | 71.6 (7) |
N6—C3—C4—C7 | 87.7 (3) | C1—C20—C21B—C22B | −172.8 (6) |
O1—C3—C4—C7 | −87.5 (3) | C20—C21B—C22B—C23B | 8.8 (14) |
N6—C3—C4—C5 | −31.2 (3) | C21B—C22B—C23B—C24B | 3.3 (16) |
O1—C3—C4—C5 | 153.5 (2) | C22B—C23B—C24B—C25B | −4.1 (16) |
O2—C5—C4—C3 | 60.2 (2) | C23B—C24B—C25B—C20 | −7.0 (13) |
C8—C5—C4—C3 | 176.0 (2) | C25A—C20—C25B—C24B | 55.8 (7) |
C14—C5—C4—C3 | −60.2 (3) | C21B—C20—C25B—C24B | 18.8 (9) |
O2—C5—C4—C6 | −174.25 (19) | C21A—C20—C25B—C24B | −61.7 (7) |
C8—C5—C4—C6 | −58.5 (2) | C1—C20—C25B—C24B | 173.0 (6) |
Cg1, Cg2, Cg3 and Cg4 are the centroids of the C14–C19, C8–C13, C14–C19 and C20–C25 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···N6 | 0.86 (3) | 1.89 (3) | 2.712 (3) | 159 (3) |
C1—H1···Cg2i | 0.98 | 2.80 | 3.771 (3) | 173 |
C2—H2A···Cg2ii | 0.97 | 2.86 | 3.589 (3) | 132 |
C21A—H21A···Cg1 | 0.93 | 2.81 | 3.058 (4) | 97 |
C24B—H24B···Cg3iii | 0.93 | 2.87 | 3.776 (6) | 166 |
C24B—H24B···Cg4iii | 0.93 | 2.97 | 3.785 (9) | 147 |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) x−1, y, z; (iii) x−1/2, −y+3/2, −z. |
Experimental details
Crystal data | |
Chemical formula | C25H25NO2 |
Mr | 371.46 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 293 |
a, b, c (Å) | 9.5405 (2), 10.9430 (9), 19.2901 (6) |
V (Å3) | 2013.92 (18) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.34 × 0.07 × 0.06 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2008) |
Tmin, Tmax | 0.849, 0.977 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5590, 2428, 2103 |
Rint | 0.040 |
(sin θ/λ)max (Å−1) | 0.633 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.102, 1.08 |
No. of reflections | 2428 |
No. of parameters | 305 |
No. of restraints | 338 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.21, −0.17 |
Computer programs: APEX2 (Bruker, 2008), SAINT (Bruker, 2008), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 2010), SHELXTL (Sheldrick, 2008) and publCIF (Westrip, 2010).
Cg1, Cg2, Cg3 and Cg4 are the centroids of the C14–C19, C8–C13, C14–C19 and C20–C25 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···N6 | 0.86 (3) | 1.89 (3) | 2.712 (3) | 159 (3) |
C1—H1···Cg2i | 0.9800 | 2.80 | 3.771 (3) | 173 |
C2—H2A···Cg2ii | 0.9700 | 2.86 | 3.589 (3) | 132 |
C21A—H21A···Cg1 | 0.9300 | 2.81 | 3.058 (4) | 97 |
C24B—H24B···Cg3iii | 0.9300 | 2.87 | 3.776 (6) | 166 |
C24B—H24B···Cg4iii | 0.9300 | 2.97 | 3.785 (9) | 147 |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) x−1, y, z; (iii) x−1/2, −y+3/2, −z. |
Acknowledgements
This work was supported by the Key Laboratory of Polymer Materials of Gansu Province (Northwest Normal University).
References
Brandenburg, K. (2010). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Bruker (2008). SAINT, APEX2 and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Ghosh, A. K., Mathivanan, P. & Cappiello, J. (1998). Tetrahedron Asymmetry, 9, 1–45. Web of Science CrossRef CAS Google Scholar
Gilli, G. & Gilli, P. (2009). The Nature of the Hydrogen Bond. Outline of a Comprehensive Hydrogen Bond Theory, p. 61. International Union of Crystallography. Oxford Science Publications. New York, Oxford: Oxford University Press Inc. Google Scholar
Johnson, J. S. & Evans, D. A. (2000). Acc. Chem. Res. 33, 325–335. Web of Science CrossRef PubMed CAS Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
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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.
Over the last decade, C2-symmetric chiral oxazoline metal complexes have been recognized as an effective class of chiral catalyst in a variety of transition metal catalyzed asymmetric reactions. Thus, the design and synthesis of new chiral oxazoline ligands has inspired many scientists to work with great efforts (Ghosh et al., 1998, Johnson & Evans, 2000).
The title compound (Fig. 1) is a new oxazoline ligand, (S)-2-methyl-1,1-diphenyl-2-(4-phenyl-4,5-dihydrooxazol-2-yl propan-1-ol), which has been designed as a potential ligand for asymmetric catalysis. It combines diphenyl methyl units and chiral oxazoline ring together with dimethyl methyl malonate.
Fig. 2 shows the packing of the molecules in the title structure.
Peculiarity of the title crystal structure is presence of a disorder which affects one of the phenyl rings which is split into two positions: C20//C21a//C22a//C23a//C24a//C25a and C20//C21b//C22b//C23b//C24b//C25b, the respective occupations of which are 0.600 (4) and 0.400 (4). The interplanar angle of both disordered rings equals to 77.8 (2)°.
There is an intramolecular hydrogen bond O2—H2···N6 of moderate strength in the structure (Tab. 1). (For categorization of the hydrogen bonds, see Gilli & Gilli, 2009.) There are present C—H···π-electron ring interactions in the structure (Tab. 1), too.