organic compounds
(1RS,2SR,5SR)-9-Benzyl-2-[(1RS)-1-hydroxybenzyl]-9-azabicyclo[3.3.1]nonan-3-one from synchrotron data
aInstitute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland, and bSynchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Biosciences Division, Bldg 202, Argonne, IL 60439, USA
*Correspondence e-mail: lazny@uwb.edu.pl
In the 22H25NO2, solved and refined against sychrotron diffraction data, the hydroxy group and the carbonyl O atom participate in the formation of O—H⋯O hydrogen bonds between pairs of enantiomers related by a crystallographic centre of symmetry.
of the racemic title compound, CRelated literature
For recent background literature on the synthesis, structure and applications of related granatane-derived aldols, see: Lazny et al. (2011a) and references cited therein. For the stereoselective syntheses, applications and structures of related tropinone aldols, see: Sienkiewicz et al. (2009); Lazny et al. (2011b); Brzezinski et al. (2012) and for related nortropinone aldols, see: Lazny et al. (2001, 2010); Lazny & Nodzewska (2003).
Experimental
Crystal data
|
Refinement
|
Data collection: NECAT APS beamline software; cell HKL-2000 (Otwinowski & Minor, 1997); data reduction: HKL-2000; program(s) used to solve structure: SHELXD (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and pyMOL (DeLano, 2002); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536812014754/kp2402sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812014754/kp2402Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812014754/kp2402Isup3.cml
A solution of n-butyllithium in hexane (2.5M, 0.88 mL, 2.0 mmol) was added dropwise to a cooled (273 K) and stirred solution of diisopropylamine (0.3 ml, 2.2 mmol) in tetrahydrofuran (6 mL). The mixture was stirred for 30 min at 273 K, and cooled down to 195 K. Then a solution of N-benzylnorgranatanone (0.459 g, 2.0 mmol) in tetrahydrofuran (3 mL) was added dropwise. After stirring for 90 min, benzaldehyde (0.22 ml, 2.18 mmol) was added dropwise and the mixture was stirred for another 15 min. The reaction was quenched with saturated aq. NH4Cl (2 mL), the mixture was diluted with water (10 mL), and extracted with dichloromethane (3 × 20 mL). The combined organic extracts were dried over Na2SO4 and concentrated to give the crude product as a white solid (0.663 g, 99%). Crystallization from a mixed solvent system heptane/dichloromethane gave the product (0.243 g, 75%) as white crystals. Analytical sample was recrystallized from ethyl acetate. [m.p. 412–413 K, Rf: 0.65 (50% ethyl acetate/hexanes); HR (MS-ESI): MNa+, found 358.1794, C22H25NNaO2 requires 358.1783; 1H NMR (CDCl3): 7.43–7.41 (m, 4H), 7.40–7.34 (m, 1H), 7.31–7.28 (m, 1H), 7.26–7.20 (m, 3H), 6.67 (s, 1H), 5.16 (d, J= 4.0 Hz, 1H), 4.04 (q, J= 12.8 Hz, 2H), 3.41 (d, J= 3.6 Hz, 1H), 3.68–3.64 (m, 1H), 2.92 (dd, J1= 16.2 Hz, J2=7.0 Hz, 1H), 2.57 (d, J= 4.0 Hz, 1H), 2.43 (d, J= 16.2 Hz, 1H), 2.19–2.13 (m, 2H), 1.65–1.62 (m, 2H), 1.37–1.32 (m, 2H)].
All hydrogen atoms were constrained to idealized positions with C—H distances fixed at 0.95–1.00 Å and O—H distances fixed at 0.84 Å and Uiso(H) = 1.5Ueq(C) for hydroxy hydrogen atom and 1.2Ueq(C) for others.
Data collection: NECAT APS beamline software; cell
HKL-2000 (Otwinowski & Minor, 1997); data reduction: HKL-2000 (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXD (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and pyMOL (DeLano, 2002); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C22H25NO2 | F(000) = 720 |
Mr = 335.43 | Dx = 1.306 Mg m−3 |
Monoclinic, P21/c | Synchrotron radiation, λ = 0.61992 Å |
Hall symbol: -P 2ybc | Cell parameters from 8582 reflections |
a = 14.380 (3) Å | θ = 2.4–31.7° |
b = 9.3100 (19) Å | µ = 0.08 mm−1 |
c = 13.270 (3) Å | T = 100 K |
β = 106.21 (3)° | Needle, colourless |
V = 1705.9 (6) Å3 | 0.3 × 0.1 × 0.1 mm |
Z = 4 |
Mar Research MAR315 CCD diffractometer | 8582 independent reflections |
Radiation source: NECAT 24ID-C synchrotron beamline APS, USA | 7757 reflections with I > 2σ(I) |
Si111 double crystal monochromator | Rint = 0.046 |
ω scans | θmax = 31.7°, θmin = 2.4° |
Absorption correction: multi-scan (SCALEPACK; Otwinowski et al., 2003) | h = −24→23 |
Tmin = 0.975, Tmax = 0.992 | k = −15→0 |
64629 measured reflections | l = 0→22 |
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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.119 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.076P)2 + 0.3P] where P = (Fo2 + 2Fc2)/3 |
8582 reflections | (Δ/σ)max = 0.001 |
227 parameters | Δρmax = 0.58 e Å−3 |
0 restraints | Δρmin = −0.30 e Å−3 |
C22H25NO2 | V = 1705.9 (6) Å3 |
Mr = 335.43 | Z = 4 |
Monoclinic, P21/c | Synchrotron radiation, λ = 0.61992 Å |
a = 14.380 (3) Å | µ = 0.08 mm−1 |
b = 9.3100 (19) Å | T = 100 K |
c = 13.270 (3) Å | 0.3 × 0.1 × 0.1 mm |
β = 106.21 (3)° |
Mar Research MAR315 CCD diffractometer | 8582 independent reflections |
Absorption correction: multi-scan (SCALEPACK; Otwinowski et al., 2003) | 7757 reflections with I > 2σ(I) |
Tmin = 0.975, Tmax = 0.992 | Rint = 0.046 |
64629 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.119 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.58 e Å−3 |
8582 reflections | Δρmin = −0.30 e Å−3 |
227 parameters |
Experimental. The crystal was mounted with vaseline on a pin-attached capillary. Upon mounting, the crystal was quenched to 100 K in a nitrogen-gas stream supplied by an Oxford Cryo-Jet. Diffraction data were measured at the station 24-ID—C of the APS synchrotron by rotation method. |
Geometry. All e.s.d.'s 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. |
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 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. |
x | y | z | Uiso*/Ueq | ||
C1 | 0.30958 (3) | 0.78442 (5) | 0.11193 (4) | 0.00793 (8) | |
H1 | 0.2751 | 0.7328 | 0.1570 | 0.010* | |
C2 | 0.36548 (3) | 0.67096 (5) | 0.06626 (4) | 0.00840 (8) | |
H2 | 0.4214 | 0.6355 | 0.1241 | 0.010* | |
C3 | 0.40394 (4) | 0.73073 (6) | −0.02043 (4) | 0.01010 (8) | |
O3 | 0.48222 (3) | 0.69336 (5) | −0.03110 (4) | 0.01510 (8) | |
C4 | 0.33793 (4) | 0.83261 (6) | −0.09524 (4) | 0.01142 (9) | |
H4A | 0.2903 | 0.7762 | −0.1489 | 0.014* | |
H4B | 0.3768 | 0.8897 | −0.1317 | 0.014* | |
C5 | 0.28317 (4) | 0.93572 (6) | −0.04151 (4) | 0.01032 (8) | |
H5 | 0.2313 | 0.9837 | −0.0976 | 0.012* | |
C6 | 0.34966 (4) | 1.05349 (6) | 0.02088 (4) | 0.01288 (9) | |
H6A | 0.3832 | 1.1020 | −0.0254 | 0.015* | |
H6B | 0.3099 | 1.1261 | 0.0443 | 0.015* | |
C7 | 0.42514 (4) | 0.99255 (6) | 0.11677 (4) | 0.01233 (9) | |
H7A | 0.4588 | 1.0726 | 0.1614 | 0.015* | |
H7B | 0.4740 | 0.9370 | 0.0933 | 0.015* | |
C8 | 0.37747 (4) | 0.89508 (6) | 0.18111 (4) | 0.01071 (8) | |
H8A | 0.3402 | 0.9548 | 0.2178 | 0.013* | |
H8B | 0.4284 | 0.8442 | 0.2350 | 0.013* | |
N9 | 0.23546 (3) | 0.85037 (5) | 0.02376 (3) | 0.00863 (7) | |
C10 | 0.29832 (3) | 0.54154 (6) | 0.02123 (4) | 0.00928 (8) | |
H10 | 0.2345 | 0.5823 | −0.0194 | 0.011* | |
O10 | 0.33364 (3) | 0.45861 (5) | −0.05034 (3) | 0.01360 (8) | |
H10A | 0.3898 | 0.4294 | −0.0203 | 0.020* | |
C11 | 0.27972 (3) | 0.45235 (5) | 0.10896 (4) | 0.00883 (8) | |
C12 | 0.18961 (4) | 0.45726 (6) | 0.12906 (4) | 0.01206 (9) | |
H12 | 0.1403 | 0.5180 | 0.0881 | 0.014* | |
C13 | 0.17105 (4) | 0.37413 (7) | 0.20856 (5) | 0.01465 (10) | |
H13 | 0.1093 | 0.3782 | 0.2213 | 0.018* | |
C14 | 0.24272 (4) | 0.28511 (6) | 0.26930 (4) | 0.01428 (10) | |
H14 | 0.2298 | 0.2270 | 0.3227 | 0.017* | |
C15 | 0.33362 (4) | 0.28183 (6) | 0.25111 (4) | 0.01342 (9) | |
H15 | 0.3833 | 0.2228 | 0.2933 | 0.016* | |
C16 | 0.35203 (4) | 0.36467 (6) | 0.17144 (4) | 0.01158 (9) | |
H16 | 0.4141 | 0.3616 | 0.1595 | 0.014* | |
C17 | 0.16235 (4) | 0.93738 (6) | 0.05545 (4) | 0.01253 (9) | |
H17A | 0.1176 | 0.9806 | −0.0079 | 0.015* | |
H17B | 0.1954 | 1.0166 | 0.1014 | 0.015* | |
C18 | 0.10470 (4) | 0.85031 (6) | 0.11268 (4) | 0.01131 (9) | |
C19 | 0.13134 (4) | 0.84836 (6) | 0.22226 (4) | 0.01282 (9) | |
H19 | 0.1831 | 0.9076 | 0.2603 | 0.015* | |
C20 | 0.08325 (4) | 0.76093 (7) | 0.27672 (5) | 0.01567 (10) | |
H20 | 0.1035 | 0.7585 | 0.3512 | 0.019* | |
C21 | 0.00550 (4) | 0.67733 (7) | 0.22170 (5) | 0.01794 (11) | |
H21 | −0.0269 | 0.6164 | 0.2584 | 0.022* | |
C22 | −0.02467 (4) | 0.68332 (8) | 0.11257 (5) | 0.01934 (11) | |
H22 | −0.0794 | 0.6292 | 0.0749 | 0.023* | |
C23 | 0.02508 (4) | 0.76839 (7) | 0.05837 (5) | 0.01621 (10) | |
H23 | 0.0047 | 0.7707 | −0.0162 | 0.019* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.00930 (16) | 0.00893 (19) | 0.00596 (16) | 0.00061 (13) | 0.00280 (13) | −0.00010 (13) |
C2 | 0.00893 (16) | 0.00910 (19) | 0.00783 (16) | −0.00015 (13) | 0.00343 (13) | −0.00046 (13) |
C3 | 0.01167 (18) | 0.0101 (2) | 0.01030 (18) | −0.00211 (14) | 0.00599 (14) | −0.00254 (14) |
O3 | 0.01403 (16) | 0.01532 (19) | 0.01972 (19) | 0.00038 (13) | 0.01092 (14) | −0.00186 (15) |
C4 | 0.01423 (19) | 0.0137 (2) | 0.00782 (17) | −0.00160 (15) | 0.00560 (15) | 0.00005 (15) |
C5 | 0.01295 (18) | 0.0109 (2) | 0.00784 (17) | −0.00003 (15) | 0.00418 (14) | 0.00183 (14) |
C6 | 0.0171 (2) | 0.0097 (2) | 0.0129 (2) | −0.00171 (16) | 0.00595 (16) | 0.00079 (15) |
C7 | 0.01364 (19) | 0.0116 (2) | 0.01232 (19) | −0.00284 (15) | 0.00451 (15) | −0.00222 (16) |
C8 | 0.01263 (18) | 0.0115 (2) | 0.00778 (17) | −0.00095 (15) | 0.00251 (14) | −0.00161 (14) |
N9 | 0.00942 (15) | 0.01032 (18) | 0.00683 (15) | 0.00179 (12) | 0.00338 (12) | 0.00153 (12) |
C10 | 0.01063 (17) | 0.0100 (2) | 0.00774 (17) | −0.00114 (14) | 0.00340 (13) | −0.00120 (14) |
O10 | 0.01844 (17) | 0.01365 (18) | 0.01040 (15) | −0.00106 (13) | 0.00681 (13) | −0.00429 (13) |
C11 | 0.00996 (17) | 0.00859 (19) | 0.00832 (17) | −0.00088 (13) | 0.00316 (13) | −0.00087 (13) |
C12 | 0.01043 (18) | 0.0135 (2) | 0.0130 (2) | −0.00065 (15) | 0.00445 (15) | 0.00118 (16) |
C13 | 0.0149 (2) | 0.0158 (2) | 0.0156 (2) | −0.00242 (17) | 0.00802 (17) | 0.00100 (18) |
C14 | 0.0206 (2) | 0.0125 (2) | 0.01139 (19) | −0.00221 (17) | 0.00719 (17) | 0.00027 (16) |
C15 | 0.0181 (2) | 0.0119 (2) | 0.01043 (19) | 0.00227 (16) | 0.00425 (16) | 0.00130 (16) |
C16 | 0.01218 (18) | 0.0124 (2) | 0.01057 (18) | 0.00178 (15) | 0.00386 (14) | 0.00047 (15) |
C17 | 0.01361 (19) | 0.0129 (2) | 0.0126 (2) | 0.00440 (16) | 0.00617 (15) | 0.00246 (16) |
C18 | 0.01020 (17) | 0.0139 (2) | 0.01086 (18) | 0.00307 (15) | 0.00472 (14) | 0.00007 (15) |
C19 | 0.01191 (18) | 0.0166 (2) | 0.01089 (19) | 0.00131 (16) | 0.00477 (15) | −0.00027 (16) |
C20 | 0.0147 (2) | 0.0212 (3) | 0.0132 (2) | 0.00182 (18) | 0.00730 (17) | 0.00159 (18) |
C21 | 0.0158 (2) | 0.0205 (3) | 0.0214 (3) | −0.00107 (19) | 0.01156 (19) | −0.0008 (2) |
C22 | 0.0138 (2) | 0.0253 (3) | 0.0208 (3) | −0.00457 (19) | 0.00800 (19) | −0.0067 (2) |
C23 | 0.01207 (19) | 0.0241 (3) | 0.0130 (2) | −0.00040 (18) | 0.00449 (16) | −0.00376 (19) |
C1—N9 | 1.4784 (8) | O10—H10A | 0.8400 |
C1—C8 | 1.5353 (8) | C11—C12 | 1.3947 (8) |
C1—C2 | 1.5496 (7) | C11—C16 | 1.3977 (8) |
C1—H1 | 1.0000 | C12—C13 | 1.3931 (8) |
C2—C3 | 1.5147 (7) | C12—H12 | 0.9500 |
C2—C10 | 1.5554 (8) | C13—C14 | 1.3910 (9) |
C2—H2 | 1.0000 | C13—H13 | 0.9500 |
C3—O3 | 1.2236 (7) | C14—C15 | 1.3942 (9) |
C3—C4 | 1.5033 (8) | C14—H14 | 0.9500 |
C4—C5 | 1.5374 (8) | C15—C16 | 1.3924 (8) |
C4—H4A | 0.9900 | C15—H15 | 0.9500 |
C4—H4B | 0.9900 | C16—H16 | 0.9500 |
C5—N9 | 1.4778 (7) | C17—C18 | 1.5075 (8) |
C5—C6 | 1.5362 (8) | C17—H17A | 0.9900 |
C5—H5 | 1.0000 | C17—H17B | 0.9900 |
C6—C7 | 1.5324 (9) | C18—C23 | 1.3969 (9) |
C6—H6A | 0.9900 | C18—C19 | 1.3966 (8) |
C6—H6B | 0.9900 | C19—C20 | 1.3936 (8) |
C7—C8 | 1.5326 (8) | C19—H19 | 0.9500 |
C7—H7A | 0.9900 | C20—C21 | 1.3903 (10) |
C7—H7B | 0.9900 | C20—H20 | 0.9500 |
C8—H8A | 0.9900 | C21—C22 | 1.3920 (10) |
C8—H8B | 0.9900 | C21—H21 | 0.9500 |
N9—C17 | 1.4782 (7) | C22—C23 | 1.3941 (9) |
C10—O10 | 1.4232 (7) | C22—H22 | 0.9500 |
C10—C11 | 1.5133 (7) | C23—H23 | 0.9500 |
C10—H10 | 1.0000 | ||
N9—C1—C8 | 113.09 (5) | O10—C10—C2 | 112.19 (4) |
N9—C1—C2 | 108.16 (4) | C11—C10—C2 | 110.71 (4) |
C8—C1—C2 | 112.25 (4) | O10—C10—H10 | 106.9 |
N9—C1—H1 | 107.7 | C11—C10—H10 | 106.9 |
C8—C1—H1 | 107.7 | C2—C10—H10 | 106.9 |
C2—C1—H1 | 107.7 | C10—O10—H10A | 109.5 |
C3—C2—C1 | 112.69 (4) | C12—C11—C16 | 118.86 (5) |
C3—C2—C10 | 108.18 (4) | C12—C11—C10 | 120.15 (5) |
C1—C2—C10 | 110.12 (4) | C16—C11—C10 | 120.99 (4) |
C3—C2—H2 | 108.6 | C13—C12—C11 | 120.75 (5) |
C1—C2—H2 | 108.6 | C13—C12—H12 | 119.6 |
C10—C2—H2 | 108.6 | C11—C12—H12 | 119.6 |
O3—C3—C4 | 122.33 (5) | C14—C13—C12 | 120.14 (5) |
O3—C3—C2 | 121.74 (5) | C14—C13—H13 | 119.9 |
C4—C3—C2 | 115.87 (4) | C12—C13—H13 | 119.9 |
C3—C4—C5 | 113.48 (4) | C13—C14—C15 | 119.45 (5) |
C3—C4—H4A | 108.9 | C13—C14—H14 | 120.3 |
C5—C4—H4A | 108.9 | C15—C14—H14 | 120.3 |
C3—C4—H4B | 108.9 | C16—C15—C14 | 120.36 (5) |
C5—C4—H4B | 108.9 | C16—C15—H15 | 119.8 |
H4A—C4—H4B | 107.7 | C14—C15—H15 | 119.8 |
N9—C5—C6 | 112.88 (4) | C15—C16—C11 | 120.42 (5) |
N9—C5—C4 | 108.53 (5) | C15—C16—H16 | 119.8 |
C6—C5—C4 | 111.92 (4) | C11—C16—H16 | 119.8 |
N9—C5—H5 | 107.8 | N9—C17—C18 | 112.54 (5) |
C6—C5—H5 | 107.8 | N9—C17—H17A | 109.1 |
C4—C5—H5 | 107.8 | C18—C17—H17A | 109.1 |
C7—C6—C5 | 111.92 (5) | N9—C17—H17B | 109.1 |
C7—C6—H6A | 109.2 | C18—C17—H17B | 109.1 |
C5—C6—H6A | 109.2 | H17A—C17—H17B | 107.8 |
C7—C6—H6B | 109.2 | C23—C18—C19 | 118.50 (5) |
C5—C6—H6B | 109.2 | C23—C18—C17 | 121.36 (5) |
H6A—C6—H6B | 107.9 | C19—C18—C17 | 120.13 (5) |
C6—C7—C8 | 111.01 (4) | C20—C19—C18 | 121.06 (6) |
C6—C7—H7A | 109.4 | C20—C19—H19 | 119.5 |
C8—C7—H7A | 109.4 | C18—C19—H19 | 119.5 |
C6—C7—H7B | 109.4 | C21—C20—C19 | 119.83 (6) |
C8—C7—H7B | 109.4 | C21—C20—H20 | 120.1 |
H7A—C7—H7B | 108.0 | C19—C20—H20 | 120.1 |
C7—C8—C1 | 111.89 (4) | C22—C21—C20 | 119.68 (6) |
C7—C8—H8A | 109.2 | C22—C21—H21 | 120.2 |
C1—C8—H8A | 109.2 | C20—C21—H21 | 120.2 |
C7—C8—H8B | 109.2 | C21—C22—C23 | 120.25 (6) |
C1—C8—H8B | 109.2 | C21—C22—H22 | 119.9 |
H8A—C8—H8B | 107.9 | C23—C22—H22 | 119.9 |
C5—N9—C1 | 109.70 (4) | C22—C23—C18 | 120.58 (6) |
C5—N9—C17 | 110.82 (4) | C22—C23—H23 | 119.7 |
C1—N9—C17 | 114.54 (4) | C18—C23—H23 | 119.7 |
O10—C10—C11 | 112.85 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
O10—H10A···O3i | 0.84 | 2.11 | 2.9298 (9) | 165 |
Symmetry code: (i) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C22H25NO2 |
Mr | 335.43 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 14.380 (3), 9.3100 (19), 13.270 (3) |
β (°) | 106.21 (3) |
V (Å3) | 1705.9 (6) |
Z | 4 |
Radiation type | Synchrotron, λ = 0.61992 Å |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.3 × 0.1 × 0.1 |
Data collection | |
Diffractometer | Mar Research MAR315 CCD diffractometer |
Absorption correction | Multi-scan (SCALEPACK; Otwinowski et al., 2003) |
Tmin, Tmax | 0.975, 0.992 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 64629, 8582, 7757 |
Rint | 0.046 |
(sin θ/λ)max (Å−1) | 0.848 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.119, 1.03 |
No. of reflections | 8582 |
No. of parameters | 227 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.58, −0.30 |
Computer programs: NECAT APS beamline software, HKL-2000 (Otwinowski & Minor, 1997), SHELXD (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and pyMOL (DeLano, 2002).
D—H···A | D—H | H···A | D···A | D—H···A |
O10—H10A···O3i | 0.84 | 2.11 | 2.9298 (9) | 164.7 |
Symmetry code: (i) −x+1, −y+1, −z. |
Acknowledgements
This work was supported in part by the University of Bialystok (BST-125), the National Science Center, Poland (grant No. N N204 546939), by the Intramural Research Program of NIH, National Cancer Institute, Center for Cancer Research, and with Federal funds from the National Cancer Institute, National Institutes of Health, under Contract HHSN2612008000001E.
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Granatane (9-methyl-9-azabicyclo[3.3.1]nonane) and norgranatane (9-azabicyclo[3.3.1]nonane) are known scaffolds of several molecules tested e.g. as antagonists of human serotonin type-3 receptor (5-HT3R). So far, relatively few synthetic and natural granatane derivatives have been synthesized and studied as potential pharmaceutically useful agents. Related diastereomerically and enantimerically pure aldols of granatanone have been recently described (Lazny et al., 2011a). Related aldols of tropinone have been used as key intermediates in several stereoselective syntheses of alkaloids e.g., ferrugine (Sienkiewicz et al., 2009 and references cited therein). The N-benzyl derivative is a potentially useful intermediate for synthesis of nor-aldols of granatanone, preparation of which is unknown. Effective, stereoselective syntheses of related nortropinone aldols (Lazny & Nodzewska, 2003; Lazny et al., 2001) is still an unsolved problem. Therefore synthetically equivalent N-benzylnorgranatanone aldols should open a route to preparative accessibility of substituted norgranatanes for biomedical studies. The described N-benzyl derivative was prepared by a procedure analogous to methods known for N-methyl aldols. The synthetic procedure gave a racemic product.
The crystal structure of the title compound contains one molecule in the asymmetric unit (Fig. 1). Two intermolecular hydrogen bonds are formed between a pair of enantiomers in the crystal lattice. hydroxy group and carbonyl oxygen atom of the azabicyclo[3.3.1]nonan-3-one system participate in this interaction (Table 1, Fig. 2).