Literature DB >> 21583263

(5S,6R)-5-Methyl-6-phenyl-4-propyl-1,3,4-oxadiazinane-2-thione.

Joshua L Kocher1, Kate L Edler, Barbara A Bohling, George P Nora, Carrie Stafford, Shawn R Hitchcock, Gregory M Ferrence.   

Abstract

The title mol-ecule, C(13)H(18)N(2)OS, is an oxadiazinanthione derived from (1R,2S)-norephedrine. There are two molecules in the asymmetric. Both adopt roughly half-chair conformations; however, the 5-position carbon orients out of opposite faces of the oxadiazinanthiones plane in the two molecules. In the crystal structure, they are oriented as a dimer linked by a pair of N-H⋯S hydrogen bonds. The absolute configuration has been established from anomalous dispersion and confirms the known stereochemistry based on the synthetic procedure.

Entities:  

Year:  2009        PMID: 21583263      PMCID: PMC2969751          DOI: 10.1107/S1600536809019382

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For background, see: Hitchcock et al. (2002 ▶, 2008 ▶); Trepanier et al. (1968 ▶). For related compounds, see: Burgeson et al. (2004 ▶); Casper, Blackburn et al. (2002 ▶); Casper, Burgeson et al. (2002 ▶); Cremer & Pople (1975 ▶); Ferrence et al. (2003 ▶); Hitchcock et al. (2001 ▶, 2004 ▶); Rodrigues et al. (2005 ▶, 2006 ▶); Squire et al. (2005 ▶); Szczepura et al. (2004 ▶). For structural analysis, see: Boeyens (1978 ▶); Bruno et al. (2004 ▶); Cremer & Pople (1975 ▶); Spek (2009 ▶).

Experimental

Crystal data

C13H18N2OS M = 250.36 Monoclinic, a = 12.5888 (6) Å b = 8.0648 (4) Å c = 14.2862 (7) Å β = 112.4488 (7)° V = 1340.51 (11) Å3 Z = 4 Mo Kα radiation μ = 0.23 mm−1 T = 193 K 0.45 × 0.3 × 0.26 mm

Data collection

Bruker SMART 1000 CCD diffractometer Absorption correction: multi-scan (SADABS in SAINT-Plus; Bruker, 1999 ▶) T min = 0.812, T max = 0.943 10254 measured reflections 5344 independent reflections 5154 reflections with I > 2σ(I) R int = 0.016

Refinement

R[F 2 > 2σ(F 2)] = 0.028 wR(F 2) = 0.076 S = 1.03 5344 reflections 315 parameters 1 restraint H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.23 e Å−3 Δρmin = −0.19 e Å−3 Absolute structure: Flack (1983 ▶) Flack parameter: 0.03 (4) Data collection: SMART (Bruker, 1999 ▶); cell refinement: SAINT (Bruker, 1999 ▶); data reduction: SAINT; program(s) used to solve structure: SIR2004 (Burla et al., 2005 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997 ▶) and Mercury (Macrae et al., 2008 ▶); software used to prepare material for publication: WinGX (Farrugia, 1999 ▶) and publCIF (McMahon & Westrip, 2008 ▶). Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809019382/fj2214sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536809019382/fj2214Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report Enhanced figure: interactive version of Fig. 3
C13H18N2OSF(000) = 536
Mr = 250.36Dx = 1.24 Mg m3
Monoclinic, P21Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ybCell parameters from 4757 reflections
a = 12.5888 (6) Åθ = 2.7–26.4°
b = 8.0648 (4) ŵ = 0.23 mm1
c = 14.2862 (7) ÅT = 193 K
β = 112.4488 (7)°Prism, colourless
V = 1340.51 (11) Å30.45 × 0.3 × 0.26 mm
Z = 4
Bruker SMART 1000 CCD diffractometer5154 reflections with I > 2σ(I)
graphiteRint = 0.016
ω scansθmax = 26.4°, θmin = 1.5°
Absorption correction: multi-scan (SADABS in SAINT-Plus; Bruker, 1999)h = −15→15
Tmin = 0.812, Tmax = 0.943k = −9→10
10254 measured reflectionsl = −17→17
5344 independent reflections
Refinement on F2H atoms treated by a mixture of independent and constrained refinement
Least-squares matrix: fullw = 1/[σ2(Fo2) + (0.0464P)2 + 0.1813P] where P = (Fo2 + 2Fc2)/3
R[F2 > 2σ(F2)] = 0.028(Δ/σ)max = 0.001
wR(F2) = 0.076Δρmax = 0.23 e Å3
S = 1.03Δρmin = −0.19 e Å3
5344 reflectionsAbsolute structure: Flack (1983)
315 parametersFlack parameter: 0.03 (4)
1 restraint
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.
xyzUiso*/Ueq
H30.5801 (17)0.487 (3)0.3637 (14)0.037 (5)*
H530.4291 (18)0.298 (3)0.1944 (15)0.044 (6)*
O10.82647 (9)0.40738 (15)0.38779 (8)0.0317 (2)
C20.71123 (12)0.3987 (2)0.35160 (11)0.0266 (3)
N30.65394 (10)0.49797 (16)0.38728 (9)0.0277 (3)
N40.70414 (10)0.60668 (16)0.47180 (9)0.0260 (3)
C50.81231 (12)0.67014 (19)0.46870 (12)0.0284 (3)
H50.79560.73340.40440.034*
C60.88793 (11)0.5206 (2)0.47089 (11)0.0281 (3)
H60.95560.56350.4580.034*
C70.93458 (12)0.4261 (2)0.56893 (12)0.0292 (3)
C80.86992 (13)0.3065 (2)0.59413 (12)0.0337 (3)
H80.79350.28370.54870.04*
C90.91621 (16)0.2203 (2)0.68504 (13)0.0402 (4)
H90.87180.13860.70150.048*
C101.02754 (15)0.2541 (3)0.75165 (13)0.0427 (4)
H101.05990.19420.81340.051*
C111.09113 (15)0.3742 (3)0.72841 (13)0.0432 (4)
H111.16660.39880.77510.052*
C121.04608 (13)0.4594 (2)0.63761 (12)0.0365 (4)
H121.09120.54090.62190.044*
C130.87021 (14)0.7838 (2)0.55843 (13)0.0384 (4)
H13A0.81990.87840.55480.058*
H13B0.94310.82390.5570.058*
H13C0.88510.72270.62140.058*
C140.61975 (13)0.7372 (2)0.46634 (11)0.0301 (3)
H14A0.65080.80310.52950.036*
H14B0.54880.68240.4650.036*
C150.58656 (15)0.8565 (2)0.37746 (13)0.0386 (4)
H15A0.55360.7940.31310.046*
H15B0.65570.9160.37820.046*
C160.4989 (2)0.9805 (3)0.38432 (19)0.0642 (6)
H16A0.47721.05650.32650.096*
H16B0.53251.04380.44740.096*
H16C0.43060.92120.38350.096*
S170.64745 (3)0.25776 (5)0.25998 (3)0.03521 (10)
O510.18836 (8)0.39587 (13)0.16424 (8)0.0282 (2)
C520.30313 (12)0.39369 (19)0.20313 (11)0.0261 (3)
N530.35868 (11)0.29154 (17)0.16570 (9)0.0277 (3)
N540.30882 (10)0.15932 (16)0.09668 (9)0.0273 (3)
C550.19357 (12)0.12386 (19)0.09575 (12)0.0270 (3)
H550.15280.05020.03660.032*
C560.12635 (11)0.28685 (18)0.07989 (11)0.0252 (3)
H560.12370.33950.01560.03*
C570.00531 (11)0.27209 (18)0.07641 (10)0.0252 (3)
C58−0.02242 (13)0.3144 (2)0.15848 (11)0.0331 (3)
H580.03580.35530.21860.04*
C59−0.13361 (14)0.2977 (2)0.15410 (13)0.0371 (4)
H59−0.15130.32640.2110.045*
C60−0.21914 (13)0.2390 (2)0.06632 (13)0.0355 (3)
H60−0.29560.22710.0630.043*
C61−0.19292 (13)0.1979 (2)−0.01602 (13)0.0334 (3)
H61−0.25170.1584−0.07620.04*
C62−0.08151 (13)0.21385 (19)−0.01173 (12)0.0289 (3)
H62−0.06420.1851−0.06880.035*
C630.20153 (14)0.0328 (2)0.19114 (12)0.0351 (3)
H63A0.2454−0.06980.19750.053*
H63B0.1240.00610.18730.053*
H63C0.24030.10340.25030.053*
C640.31096 (13)0.1969 (2)−0.00361 (11)0.0323 (3)
H64A0.27330.3053−0.02710.039*
H64B0.26630.1114−0.05250.039*
C650.43186 (14)0.2023 (3)−0.00219 (13)0.0449 (5)
H65A0.47250.09830.02770.054*
H65B0.47430.29570.04080.054*
C660.43043 (18)0.2236 (4)−0.10884 (15)0.0600 (6)
H66A0.50950.226−0.10580.09*
H66B0.39180.3277−0.13790.09*
H66C0.38910.1306−0.15130.09*
S670.36887 (3)0.52486 (5)0.29914 (3)0.03515 (10)
U11U22U33U12U13U23
O10.0211 (5)0.0432 (7)0.0292 (5)0.0010 (4)0.0078 (4)−0.0076 (5)
C20.0228 (7)0.0307 (8)0.0260 (7)−0.0016 (6)0.0090 (6)0.0002 (6)
N30.0196 (6)0.0315 (7)0.0300 (6)−0.0015 (5)0.0072 (5)−0.0047 (5)
N40.0235 (6)0.0285 (7)0.0252 (6)−0.0016 (5)0.0083 (5)−0.0027 (5)
C50.0240 (7)0.0301 (8)0.0301 (7)−0.0016 (6)0.0093 (6)0.0020 (6)
C60.0196 (6)0.0349 (8)0.0288 (7)−0.0049 (6)0.0081 (5)−0.0034 (7)
C70.0230 (7)0.0330 (8)0.0310 (8)0.0022 (6)0.0096 (6)−0.0041 (6)
C80.0276 (7)0.0352 (8)0.0355 (8)−0.0006 (6)0.0089 (6)−0.0010 (7)
C90.0446 (10)0.0385 (10)0.0410 (9)0.0034 (7)0.0201 (8)0.0034 (8)
C100.0461 (9)0.0476 (10)0.0314 (8)0.0139 (9)0.0112 (7)0.0050 (8)
C110.0313 (8)0.0539 (11)0.0350 (9)0.0074 (8)0.0021 (7)−0.0035 (8)
C120.0255 (8)0.0433 (9)0.0364 (8)−0.0012 (7)0.0070 (6)−0.0025 (7)
C130.0339 (8)0.0358 (9)0.0408 (9)−0.0067 (7)0.0089 (7)−0.0054 (7)
C140.0286 (7)0.0344 (8)0.0282 (7)0.0022 (6)0.0119 (6)−0.0039 (6)
C150.0381 (9)0.0367 (9)0.0407 (9)0.0073 (7)0.0146 (7)0.0047 (7)
C160.0586 (13)0.0610 (15)0.0805 (15)0.0297 (11)0.0349 (12)0.0218 (12)
S170.02566 (18)0.0418 (2)0.0374 (2)−0.00325 (16)0.01108 (15)−0.01413 (17)
O510.0194 (5)0.0265 (5)0.0336 (6)−0.0015 (4)0.0045 (4)−0.0038 (4)
C520.0217 (7)0.0280 (8)0.0261 (7)−0.0011 (6)0.0063 (6)0.0034 (6)
N530.0190 (6)0.0345 (7)0.0256 (6)−0.0024 (5)0.0040 (5)−0.0028 (5)
N540.0221 (6)0.0291 (7)0.0279 (6)−0.0005 (5)0.0063 (5)−0.0024 (5)
C550.0228 (7)0.0250 (7)0.0307 (8)−0.0020 (6)0.0073 (6)−0.0007 (6)
C560.0222 (7)0.0258 (7)0.0250 (6)−0.0022 (6)0.0062 (5)−0.0001 (6)
C570.0209 (6)0.0241 (7)0.0272 (7)−0.0002 (5)0.0053 (5)0.0020 (6)
C580.0273 (7)0.0420 (9)0.0256 (7)−0.0035 (6)0.0052 (6)0.0004 (6)
C590.0327 (8)0.0471 (10)0.0348 (8)−0.0014 (7)0.0164 (7)−0.0006 (7)
C600.0234 (7)0.0362 (9)0.0473 (9)−0.0019 (6)0.0139 (7)−0.0004 (8)
C610.0229 (7)0.0315 (8)0.0388 (8)−0.0038 (6)0.0039 (6)−0.0063 (7)
C620.0262 (7)0.0282 (8)0.0303 (7)−0.0003 (6)0.0086 (6)−0.0045 (6)
C630.0316 (7)0.0327 (8)0.0397 (8)0.0012 (7)0.0123 (6)0.0072 (7)
C640.0262 (7)0.0392 (9)0.0285 (7)−0.0016 (6)0.0072 (6)−0.0055 (7)
C650.0295 (8)0.0701 (13)0.0359 (9)0.0009 (8)0.0135 (7)−0.0035 (9)
C660.0442 (10)0.1014 (18)0.0394 (10)−0.0052 (11)0.0218 (8)−0.0079 (12)
S670.02293 (17)0.0437 (2)0.03399 (19)−0.00201 (16)0.00548 (14)−0.01305 (17)
O1—C21.3432 (17)O51—C521.3355 (17)
O1—C61.4627 (18)O51—C561.4548 (16)
C2—N31.305 (2)C52—N531.319 (2)
C2—S171.6873 (15)C52—S671.6788 (15)
N3—N41.4294 (17)N53—N541.4250 (18)
N3—H30.86 (2)N53—H530.82 (2)
N4—C51.4711 (18)N54—C551.4739 (18)
N4—C141.476 (2)N54—C641.475 (2)
C5—C131.517 (2)C55—C631.517 (2)
C5—C61.530 (2)C55—C561.533 (2)
C5—H51C55—H551
C6—C71.503 (2)C56—C571.5101 (18)
C6—H61C56—H561
C7—C81.396 (2)C57—C581.388 (2)
C7—C121.397 (2)C57—C621.3963 (19)
C8—C91.390 (2)C58—C591.384 (2)
C8—H80.95C58—H580.95
C9—C101.388 (3)C59—C601.388 (2)
C9—H90.95C59—H590.95
C10—C111.375 (3)C60—C611.378 (2)
C10—H100.95C60—H600.95
C11—C121.384 (2)C61—C621.386 (2)
C11—H110.95C61—H610.95
C12—H120.95C62—H620.95
C13—H13A0.98C63—H63A0.98
C13—H13B0.98C63—H63B0.98
C13—H13C0.98C63—H63C0.98
C14—C151.519 (2)C64—C651.515 (2)
C14—H14A0.99C64—H64A0.99
C14—H14B0.99C64—H64B0.99
C15—C161.520 (3)C65—C661.527 (3)
C15—H15A0.99C65—H65A0.99
C15—H15B0.99C65—H65B0.99
C16—H16A0.98C66—H66A0.98
C16—H16B0.98C66—H66B0.98
C16—H16C0.98C66—H66C0.98
C2—O1—C6120.25 (12)C52—O51—C56119.32 (11)
N3—C2—O1119.64 (13)N53—C52—O51119.77 (13)
N3—C2—S17123.11 (11)N53—C52—S67123.55 (11)
O1—C2—S17117.25 (11)O51—C52—S67116.68 (11)
C2—N3—N4125.07 (12)C52—N53—N54125.90 (12)
C2—N3—H3117.2 (13)C52—N53—H53113.1 (15)
N4—N3—H3117.1 (13)N54—N53—H53120.0 (15)
N3—N4—C5107.68 (11)N53—N54—C55108.87 (11)
N3—N4—C14108.40 (11)N53—N54—C64110.61 (12)
C5—N4—C14113.96 (12)C55—N54—C64114.47 (11)
N4—C5—C13109.66 (13)N54—C55—C63111.02 (12)
N4—C5—C6107.52 (12)N54—C55—C56108.73 (12)
C13—C5—C6111.41 (12)C63—C55—C56113.03 (13)
N4—C5—H5109.4N54—C55—H55108
C13—C5—H5109.4C63—C55—H55108
C6—C5—H5109.4C56—C55—H55108
O1—C6—C7109.73 (13)O51—C56—C57106.89 (11)
O1—C6—C5110.08 (11)O51—C56—C55107.73 (11)
C7—C6—C5115.94 (12)C57—C56—C55115.50 (12)
O1—C6—H6106.9O51—C56—H56108.9
C7—C6—H6106.9C57—C56—H56108.9
C5—C6—H6106.9C55—C56—H56108.9
C8—C7—C12118.68 (15)C58—C57—C62118.80 (13)
C8—C7—C6122.14 (13)C58—C57—C56121.94 (12)
C12—C7—C6119.17 (14)C62—C57—C56119.26 (13)
C9—C8—C7120.61 (15)C59—C58—C57120.97 (14)
C9—C8—H8119.7C59—C58—H58119.5
C7—C8—H8119.7C57—C58—H58119.5
C10—C9—C8119.73 (17)C58—C59—C60119.77 (15)
C10—C9—H9120.1C58—C59—H59120.1
C8—C9—H9120.1C60—C59—H59120.1
C11—C10—C9120.09 (16)C61—C60—C59119.83 (14)
C11—C10—H10120C61—C60—H60120.1
C9—C10—H10120C59—C60—H60120.1
C10—C11—C12120.52 (16)C60—C61—C62120.54 (14)
C10—C11—H11119.7C60—C61—H61119.7
C12—C11—H11119.7C62—C61—H61119.7
C11—C12—C7120.34 (17)C61—C62—C57120.09 (14)
C11—C12—H12119.8C61—C62—H62120
C7—C12—H12119.8C57—C62—H62120
C5—C13—H13A109.5C55—C63—H63A109.5
C5—C13—H13B109.5C55—C63—H63B109.5
H13A—C13—H13B109.5H63A—C63—H63B109.5
C5—C13—H13C109.5C55—C63—H63C109.5
H13A—C13—H13C109.5H63A—C63—H63C109.5
H13B—C13—H13C109.5H63B—C63—H63C109.5
N4—C14—C15117.29 (12)N54—C64—C65112.58 (13)
N4—C14—H14A108N54—C64—H64A109.1
C15—C14—H14A108C65—C64—H64A109.1
N4—C14—H14B108N54—C64—H64B109.1
C15—C14—H14B108C65—C64—H64B109.1
H14A—C14—H14B107.2H64A—C64—H64B107.8
C14—C15—C16109.73 (16)C64—C65—C66111.17 (15)
C14—C15—H15A109.7C64—C65—H65A109.4
C16—C15—H15A109.7C66—C65—H65A109.4
C14—C15—H15B109.7C64—C65—H65B109.4
C16—C15—H15B109.7C66—C65—H65B109.4
H15A—C15—H15B108.2H65A—C65—H65B108
C15—C16—H16A109.5C65—C66—H66A109.5
C15—C16—H16B109.5C65—C66—H66B109.5
H16A—C16—H16B109.5H66A—C66—H66B109.5
C15—C16—H16C109.5C65—C66—H66C109.5
H16A—C16—H16C109.5H66A—C66—H66C109.5
H16B—C16—H16C109.5H66B—C66—H66C109.5
C6—O1—C2—N33.6 (2)C56—O51—C52—N53−0.9 (2)
C6—O1—C2—S17−176.82 (11)C56—O51—C52—S67179.09 (10)
O1—C2—N3—N4−7.4 (2)O51—C52—N53—N54−11.2 (2)
S17—C2—N3—N4173.03 (11)S67—C52—N53—N54168.81 (11)
C2—N3—N4—C536.25 (18)C52—N53—N54—C55−15.85 (19)
C2—N3—N4—C14159.97 (14)C52—N53—N54—C64110.75 (16)
N3—N4—C5—C13−178.87 (12)N53—N54—C55—C63−74.51 (15)
C14—N4—C5—C1360.85 (16)C64—N54—C55—C63161.14 (14)
N3—N4—C5—C6−57.59 (14)N53—N54—C55—C5650.43 (15)
C14—N4—C5—C6−177.87 (11)C64—N54—C55—C56−73.92 (16)
C2—O1—C6—C7100.10 (15)C52—O51—C56—C57160.86 (12)
C2—O1—C6—C5−28.65 (18)C52—O51—C56—C5536.15 (16)
N4—C5—C6—O155.69 (15)N54—C55—C56—O51−60.99 (14)
C13—C5—C6—O1175.87 (12)C63—C55—C56—O5162.77 (15)
N4—C5—C6—C7−69.59 (16)N54—C55—C56—C57179.65 (11)
C13—C5—C6—C750.59 (17)C63—C55—C56—C57−56.60 (17)
O1—C6—C7—C8−43.15 (19)O51—C56—C57—C58−17.70 (19)
C5—C6—C7—C882.32 (19)C55—C56—C57—C58102.13 (17)
O1—C6—C7—C12137.21 (14)O51—C56—C57—C62162.47 (13)
C5—C6—C7—C12−97.32 (17)C55—C56—C57—C62−77.70 (17)
C12—C7—C8—C9−1.0 (2)C62—C57—C58—C590.7 (2)
C6—C7—C8—C9179.35 (15)C56—C57—C58—C59−179.12 (15)
C7—C8—C9—C100.3 (3)C57—C58—C59—C60−0.4 (3)
C8—C9—C10—C111.0 (3)C58—C59—C60—C61−0.2 (3)
C9—C10—C11—C12−1.6 (3)C59—C60—C61—C620.4 (3)
C10—C11—C12—C70.9 (3)C60—C61—C62—C57−0.1 (2)
C8—C7—C12—C110.4 (2)C58—C57—C62—C61−0.5 (2)
C6—C7—C12—C11−179.97 (16)C56—C57—C62—C61179.38 (14)
N3—N4—C14—C15−65.19 (17)N53—N54—C64—C6566.76 (17)
C5—N4—C14—C1554.69 (18)C55—N54—C64—C65−169.82 (14)
N4—C14—C15—C16179.66 (16)N54—C64—C65—C66174.12 (18)
D—H···AD—HH···AD···AD—H···A
N3—H3···S670.86 (2)2.48 (2)3.3257 (14)167 (2)
N53—H53···S170.82 (2)2.56 (2)3.3711 (15)167 (2)
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N3—H3⋯S670.86 (2)2.48 (2)3.3257 (14)167 (2)
N53—H53⋯S170.82 (2)2.56 (2)3.3711 (15)167 (2)
  8 in total

1.  Conformational studies of N(3)-substituted [1,3,4]-oxadiazinan-2-ones.

Authors:  David M Casper; Jennifer R Blackburn; Christopher D Maroules; Tana Brady; Joel M Esken; Gregory M Ferrence; Jean M Standard; Shawn R Hitchcock
Journal:  J Org Chem       Date:  2002-12-13       Impact factor: 4.354

2.  Retrieval of crystallographically-derived molecular geometry information.

Authors:  Ian J Bruno; Jason C Cole; Magnus Kessler; Jie Luo; W D Sam Motherwell; Lucy H Purkis; Barry R Smith; Robin Taylor; Richard I Cooper; Stephanie E Harris; A Guy Orpen
Journal:  J Chem Inf Comput Sci       Date:  2004 Nov-Dec

3.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

4.  Toward the development of a structurally novel class of chiral auxiliaries: diastereoselective aldol reactions of a (1R,2S)-ephedrine-based 3,4,5,6-tetrahydro-2H-1,3,4-oxadiazin-2-one.

Authors:  David M Casper; James R Burgeson; Joel M Esken; Gregory M Ferrence; Shawn R Hitchcock
Journal:  Org Lett       Date:  2002-10-17       Impact factor: 6.005

5.  Synthesis and pharmacological evaluation of some tetrahydrooxadiazinones and some dihydroaminooxadiazines.

Authors:  D L Trepanier; J N Eble; G H Harris
Journal:  J Med Chem       Date:  1968-03       Impact factor: 7.446

6.  Intramolecular chiral relay at stereogenic nitrogen. Synthesis and application of a new chiral auxiliary derived from (1R,2S)-norephedrine and acetone.

Authors:  Shawn R Hitchcock; David M Casper; Jeremy F Vaughn; Jennifer M Finefield; Gregory M Ferrence; Joel M Esken
Journal:  J Org Chem       Date:  2004-02-06       Impact factor: 4.354

7.  Toward the development of a structurally novel class of chiral auxiliaries. Conformational properties of the aldol adducts of oxadiazinones: observation of unusual shielding effects.

Authors:  James R Burgeson; Matthew K Renner; Ingo Hardt; Gregory M Ferrence; Jean M Standard; Shawn R Hitchcock
Journal:  J Org Chem       Date:  2004-02-06       Impact factor: 4.354

8.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  8 in total
  1 in total

1.  Applied and implied semantics in crystallographic publishing.

Authors:  Brian McMahon
Journal:  J Cheminform       Date:  2012-08-30       Impact factor: 5.514

  1 in total

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