Literature DB >> 21203240

(±)-2'-Phenyl-cyclo-hexa-nespiro-4'-(aze-pano[1,2-b]isoxazolidine).

Daryl Crimmins1, Ka Wai Choi, Peter D W Boyd, Margaret A Brimble.   

Abstract

In the crystal structure of the racemic title isoxazolidine, C(19)H(27)NO, the relative stereochemistry between the phenyl group and the bridgehead H atom is shown to be syn. There are two mol-ecules in the asymmetric unit, one of which is the 7R*,13R* enanti-omer, and one of which is the 7S*,13S* enanti-omer. These enanti-omers adopt different orientations of the phenyl ring with respect to the isoxazolidine ring, with C-C-C-C torsion angles of 63.6 (4) and 86.8 (4)°, respectively. In both enanti-omers, the six-membered ring adopts a chair conformation, while the seven-membered ring adopts a twist-chair conformation.

Entities:  

Year:  2008        PMID: 21203240      PMCID: PMC2962160          DOI: 10.1107/S1600536808021867

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


Related literature

For related literature regarding the synthesis towards the spiro­imine unit of the spiro­lides, see: Brimble & Trzoss (2004 ▶); Brimble et al. (2005 ▶); O’Connor et al. (2008 ▶). For the crystal structure of the related 7,6-spiro­lactam unit, see: Guéret et al. (2008 ▶). For isolation of spiro­lides from natural resources, see: Hu et al. (2001 ▶); MacKinnon et al. (2006 ▶); Ciminiello et al. (2007 ▶).

Experimental

Crystal data

C19H27NO M = 285.42 Triclinic, a = 9.8516 (1) Å b = 10.4560 (1) Å c = 16.0957 (1) Å α = 101.058 (1)° β = 92.833 (1)° γ = 96.527 (1)° V = 1612.34 (2) Å3 Z = 4 Mo Kα radiation μ = 0.07 mm−1 T = 85 (2) K 0.32 × 0.24 × 0.22 mm

Data collection

Siemens SMART CCD diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▶) T min = 0.978, T max = 0.985 15138 measured reflections 6437 independent reflections 4959 reflections with I > 2σ(I) R int = 0.026

Refinement

R[F 2 > 2σ(F 2)] = 0.084 wR(F 2) = 0.194 S = 1.06 6437 reflections 379 parameters H-atom parameters constrained Δρmax = 1.21 e Å−3 Δρmin = −0.32 e Å−3 Data collection: SMART (Siemens, 1995 ▶); cell refinement: SAINT (Siemens, 1995 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: ORTEPIII (Burnett & Johnson, 1996 ▶) and Mercury (Macrae et al., 2006 ▶); software used to prepare material for publication: SHELXTL (Sheldrick, 2008 ▶) and publCIF (Westrip, 2008 ▶). Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536808021867/bi2294sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536808021867/bi2294Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C19H27NOZ = 4
Mr = 285.42F000 = 624
Triclinic, P1Dx = 1.176 Mg m3
Hall symbol: -P 1Melting point: 338.8(7) K
a = 9.8516 (1) ÅMo Kα radiation λ = 0.71073 Å
b = 10.4560 (1) ÅCell parameters from 6437 reflections
c = 16.0957 (1) Åθ = 1.3–26.4º
α = 101.058 (1)ºµ = 0.07 mm1
β = 92.833 (1)ºT = 85 (2) K
γ = 96.527 (1)ºNeedles, white
V = 1612.34 (2) Å30.32 × 0.24 × 0.22 mm
Siemens SMART CCD diffractometer6437 independent reflections
Radiation source: fine-focus sealed tube4959 reflections with I > 2σ(I)
Monochromator: graphiteRint = 0.026
T = 85(2) Kθmax = 26.4º
ω scansθmin = 1.3º
Absorption correction: multi-scan(SADABS; Sheldrick, 1996)h = −12→12
Tmin = 0.978, Tmax = 0.985k = −13→12
15138 measured reflectionsl = 0→20
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.084H-atom parameters constrained
wR(F2) = 0.194  w = 1/[σ2(Fo2) + (0.0475P)2 + 4.1372P] where P = (Fo2 + 2Fc2)/3
S = 1.06(Δ/σ)max < 0.001
6437 reflectionsΔρmax = 1.21 e Å3
379 parametersΔρmin = −0.32 e Å3
Primary atom site location: structure-invariant direct methodsExtinction correction: none
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.
xyzUiso*/Ueq
O0.6455 (2)0.6154 (2)0.33169 (13)0.0268 (5)
N0.6590 (3)0.5526 (3)0.24237 (15)0.0226 (6)
C10.8405 (3)0.4282 (3)0.17312 (17)0.0161 (6)
C20.9653 (3)0.5340 (3)0.1897 (2)0.0243 (7)
H2A0.93460.61890.18940.029*
H2B1.00850.53680.24560.029*
C31.0710 (3)0.5099 (3)0.1238 (2)0.0303 (7)
H3A1.03130.51660.06870.036*
H3B1.14960.57680.13900.036*
C41.1179 (3)0.3742 (3)0.1186 (2)0.0347 (8)
H4A1.16780.37140.17150.042*
H4B1.17960.35920.07350.042*
C50.9964 (3)0.2656 (3)0.1013 (2)0.0319 (8)
H5A1.02880.18200.10330.038*
H5B0.95420.26030.04480.038*
C60.8892 (3)0.2914 (3)0.1667 (2)0.0252 (7)
H6A0.92800.28420.22190.030*
H6B0.81070.22450.15110.030*
C70.7425 (3)0.4433 (3)0.24678 (18)0.0219 (6)
H7A0.67980.36160.23970.026*
C80.5176 (3)0.5018 (3)0.20965 (18)0.0213 (6)
H8A0.45850.56900.22640.026*
H8B0.48650.42670.23410.026*
C90.5073 (3)0.4610 (3)0.11317 (18)0.0229 (6)
H9A0.41570.41690.09490.028*
H9B0.51860.53990.08960.028*
C100.6094 (3)0.3717 (3)0.07546 (19)0.0238 (7)
H10A0.58580.34370.01500.029*
H10B0.60100.29390.10030.029*
C110.7593 (3)0.4353 (3)0.08922 (18)0.0228 (6)
H11A0.76090.52720.08610.027*
H11B0.80800.39460.04230.027*
C120.8092 (3)0.4744 (3)0.33864 (19)0.0249 (7)
H12A0.76850.41390.37190.030*
H12B0.90710.47050.33930.030*
C130.7780 (3)0.6141 (3)0.37195 (19)0.0239 (7)
H13A0.84520.67750.35350.029*
C140.7717 (3)0.6482 (3)0.46735 (19)0.0254 (7)
C150.8925 (3)0.6960 (3)0.51785 (19)0.0275 (7)
H15A0.97480.70750.49260.033*
C160.8910 (3)0.7266 (3)0.60540 (19)0.0271 (7)
H16A0.97220.75780.63870.033*
C170.7693 (4)0.7109 (3)0.6432 (2)0.0324 (8)
H17A0.76830.73230.70200.039*
C180.6486 (4)0.6633 (4)0.5938 (2)0.0414 (9)
H18A0.56660.65290.61940.050*
C190.6496 (3)0.6311 (4)0.5058 (2)0.0333 (8)
H19A0.56850.59810.47280.040*
O'0.8141 (2)0.0639 (2)0.33601 (12)0.0231 (5)
N'0.7585 (2)0.0078 (2)0.24822 (14)0.0186 (5)
C1'0.5197 (3)−0.0548 (3)0.18622 (17)0.0159 (6)
C2'0.4734 (3)0.0835 (3)0.20648 (17)0.0172 (6)
H2'A0.44260.09890.26340.021*
H2'B0.55120.14870.20510.021*
C3'0.3578 (3)0.1009 (3)0.14386 (18)0.0210 (6)
H3'A0.33220.18880.15920.025*
H3'B0.38920.08980.08700.025*
C4'0.2331 (3)−0.0004 (3)0.1454 (2)0.0250 (7)
H4'A0.19800.01480.20120.030*
H4'B0.16140.00960.10450.030*
C5'0.2713 (3)−0.1402 (3)0.1242 (2)0.0234 (6)
H5'A0.2940−0.15930.06550.028*
H5'B0.1930−0.20190.13040.028*
C6'0.3936 (3)−0.1592 (3)0.18186 (19)0.0190 (6)
H6'A0.4205−0.24540.16150.023*
H6'B0.3644−0.15690.23870.023*
C7'0.6255 (3)−0.0735 (3)0.25610 (17)0.0161 (6)
H7'A0.6404−0.16610.24610.019*
C8'0.8619 (3)−0.0742 (3)0.21325 (19)0.0227 (6)
H8'A0.8582−0.15160.23840.027*
H8'B0.9525−0.02530.22720.027*
C9'0.8360 (3)−0.1158 (3)0.11659 (18)0.0221 (6)
H9'A0.8963−0.18050.09650.027*
H9'B0.8611−0.03980.09160.027*
C10'0.6885 (3)−0.1737 (3)0.08409 (18)0.0196 (6)
H10C0.6601−0.24540.11220.024*
H10D0.6863−0.20950.02370.024*
C11'0.5856 (3)−0.0725 (3)0.09918 (17)0.0181 (6)
H11C0.5124−0.09760.05440.022*
H11D0.63190.01210.09360.022*
C12'0.5939 (3)−0.0310 (3)0.34989 (18)0.0207 (6)
H12C0.5004−0.01090.35430.025*
H12D0.6083−0.09870.38180.025*
C13'0.6976 (4)0.0927 (4)0.3809 (2)0.0321 (8)
H13B0.66200.16890.36460.039*
C14'0.7431 (3)0.1240 (3)0.47534 (19)0.0287 (7)
C15'0.8144 (4)0.0435 (4)0.5145 (2)0.0370 (8)
H15B0.8305−0.03710.48320.044*
C16'0.8617 (4)0.0779 (4)0.5967 (3)0.0420 (9)
H16B0.91150.02220.62090.050*
C17'0.8369 (4)0.1928 (4)0.6440 (2)0.0367 (9)
H17B0.86910.21420.70090.044*
C18'0.7657 (4)0.2789 (4)0.6110 (2)0.0399 (9)
H18B0.74930.35750.64490.048*
C19'0.7168 (4)0.2452 (4)0.5227 (2)0.0374 (9)
H19B0.66930.30180.49790.045*
U11U22U33U12U13U23
O0.0293 (12)0.0325 (12)0.0177 (11)0.0086 (10)0.0025 (9)−0.0005 (9)
N0.0224 (13)0.0262 (14)0.0178 (12)0.0041 (10)0.0022 (10)0.0001 (10)
C10.0192 (14)0.0138 (13)0.0145 (13)0.0037 (11)0.0001 (11)0.0005 (10)
C20.0219 (15)0.0196 (15)0.0301 (17)−0.0010 (12)−0.0013 (13)0.0046 (12)
C30.0240 (16)0.0380 (19)0.0284 (17)−0.0063 (14)−0.0009 (13)0.0120 (14)
C40.0202 (16)0.042 (2)0.0372 (19)0.0034 (14)0.0091 (14)−0.0053 (16)
C50.0310 (18)0.0240 (17)0.040 (2)0.0096 (14)0.0065 (15)0.0000 (14)
C60.0241 (16)0.0220 (16)0.0305 (17)0.0053 (12)0.0016 (13)0.0066 (13)
C70.0270 (16)0.0177 (14)0.0201 (15)0.0011 (12)0.0006 (12)0.0024 (11)
C80.0174 (14)0.0245 (15)0.0220 (15)0.0021 (12)0.0010 (12)0.0048 (12)
C90.0191 (15)0.0273 (16)0.0207 (15)−0.0011 (12)−0.0024 (12)0.0041 (12)
C100.0263 (16)0.0249 (16)0.0183 (15)0.0028 (13)−0.0030 (12)0.0007 (12)
C110.0240 (16)0.0260 (16)0.0176 (14)0.0020 (12)0.0030 (12)0.0024 (12)
C120.0262 (16)0.0267 (16)0.0215 (15)0.0017 (13)−0.0001 (12)0.0057 (12)
C130.0226 (15)0.0272 (16)0.0211 (15)0.0014 (13)0.0016 (12)0.0037 (12)
C140.0248 (16)0.0300 (17)0.0189 (15)0.0024 (13)0.0021 (12)−0.0007 (13)
C150.0239 (16)0.0377 (19)0.0204 (15)0.0019 (14)0.0027 (12)0.0052 (13)
C160.0330 (18)0.0259 (16)0.0204 (15)0.0001 (13)−0.0059 (13)0.0034 (12)
C170.043 (2)0.0352 (19)0.0162 (15)0.0062 (15)0.0028 (14)−0.0023 (13)
C180.0274 (18)0.068 (3)0.0247 (18)0.0012 (17)0.0085 (14)0.0000 (17)
C190.0243 (17)0.050 (2)0.0194 (16)−0.0016 (15)0.0021 (13)−0.0039 (15)
O'0.0212 (11)0.0300 (12)0.0135 (10)−0.0037 (9)−0.0021 (8)−0.0023 (8)
N'0.0180 (12)0.0218 (13)0.0128 (11)−0.0035 (10)−0.0024 (9)0.0001 (9)
C1'0.0177 (14)0.0144 (13)0.0136 (13)−0.0011 (11)0.0004 (11)0.0002 (10)
C2'0.0204 (14)0.0150 (14)0.0152 (13)0.0010 (11)0.0024 (11)0.0013 (10)
C3'0.0253 (15)0.0190 (15)0.0193 (14)0.0073 (12)0.0020 (12)0.0027 (11)
C4'0.0186 (15)0.0265 (16)0.0295 (17)0.0065 (12)−0.0008 (12)0.0030 (13)
C5'0.0167 (14)0.0229 (16)0.0276 (16)−0.0021 (12)−0.0034 (12)0.0018 (12)
C6'0.0171 (14)0.0162 (14)0.0227 (15)−0.0008 (11)0.0004 (11)0.0032 (11)
C7'0.0164 (14)0.0135 (13)0.0179 (14)−0.0001 (10)0.0021 (11)0.0030 (10)
C8'0.0166 (14)0.0283 (16)0.0217 (15)0.0027 (12)0.0007 (12)0.0018 (12)
C9'0.0187 (15)0.0252 (16)0.0213 (15)0.0013 (12)0.0026 (12)0.0021 (12)
C10'0.0199 (14)0.0213 (15)0.0160 (14)0.0035 (12)0.0017 (11)−0.0009 (11)
C11'0.0174 (14)0.0209 (15)0.0149 (13)0.0030 (11)0.0007 (11)0.0009 (11)
C12'0.0222 (15)0.0231 (15)0.0154 (14)0.0000 (12)0.0004 (11)0.0026 (11)
C13'0.0323 (18)0.0367 (19)0.0263 (17)0.0035 (15)0.0017 (14)0.0043 (14)
C14'0.0202 (15)0.044 (2)0.0161 (15)−0.0059 (14)−0.0006 (12)−0.0018 (13)
C15'0.035 (2)0.0290 (18)0.047 (2)0.0034 (15)−0.0019 (16)0.0073 (16)
C16'0.041 (2)0.043 (2)0.043 (2)−0.0023 (17)−0.0005 (17)0.0170 (18)
C17'0.0293 (18)0.058 (2)0.0209 (17)−0.0085 (17)−0.0013 (14)0.0122 (16)
C18'0.035 (2)0.0308 (19)0.045 (2)−0.0044 (15)0.0185 (17)−0.0152 (16)
C19'0.0246 (17)0.045 (2)0.050 (2)0.0079 (15)0.0074 (16)0.0244 (18)
O—C131.431 (4)O'—C13'1.417 (4)
O—N1.480 (3)O'—N'1.474 (3)
N—C81.466 (4)N'—C8'1.469 (4)
N—C71.493 (4)N'—C7'1.503 (3)
C1—C21.533 (4)C1'—C2'1.546 (4)
C1—C61.545 (4)C1'—C6'1.547 (4)
C1—C111.554 (4)C1'—C7'1.551 (4)
C1—C71.561 (4)C1'—C11'1.561 (4)
C2—C31.529 (4)C2'—C3'1.533 (4)
C2—H2A0.970C2'—H2'A0.970
C2—H2B0.970C2'—H2'B0.970
C3—C41.529 (5)C3'—C4'1.532 (4)
C3—H3A0.970C3'—H3'A0.970
C3—H3B0.970C3'—H3'B0.970
C4—C51.529 (5)C4'—C5'1.530 (4)
C4—H4A0.970C4'—H4'A0.970
C4—H4B0.970C4'—H4'B0.970
C5—C61.537 (4)C5'—C6'1.538 (4)
C5—H5A0.970C5'—H5'A0.970
C5—H5B0.970C5'—H5'B0.970
C6—H6A0.970C6'—H6'A0.970
C6—H6B0.970C6'—H6'B0.970
C7—C121.547 (4)C7'—C12'1.547 (4)
C7—H7A0.980C7'—H7'A0.980
C8—C91.525 (4)C8'—C9'1.533 (4)
C8—H8A0.970C8'—H8'A0.970
C8—H8B0.970C8'—H8'B0.970
C9—C101.519 (4)C9'—C10'1.535 (4)
C9—H9A0.970C9'—H9'A0.970
C9—H9B0.970C9'—H9'B0.970
C10—C111.536 (4)C10'—C11'1.542 (4)
C10—H10A0.970C10'—H10C0.970
C10—H10B0.970C10'—H10D0.970
C11—H11A0.970C11'—H11C0.970
C11—H11B0.970C11'—H11D0.970
C12—C131.527 (4)C12'—C13'1.539 (4)
C12—H12A0.970C12'—H12C0.970
C12—H12B0.970C12'—H12D0.970
C13—C141.514 (4)C13'—C14'1.525 (4)
C13—H13A0.980C13'—H13B0.980
C14—C191.390 (4)C14'—C15'1.376 (5)
C14—C151.393 (4)C14'—C19'1.407 (5)
C15—C161.385 (4)C15'—C16'1.348 (5)
C15—H15A0.930C15'—H15B0.930
C16—C171.379 (5)C16'—C17'1.348 (5)
C16—H16A0.930C16'—H16B0.930
C17—C181.383 (5)C17'—C18'1.370 (6)
C17—H17A0.930C17'—H17B0.930
C18—C191.392 (5)C18'—C19'1.441 (5)
C18—H18A0.930C18'—H18B0.930
C19—H19A0.930C19'—H19B0.930
C13—O—N103.2 (2)C13'—O'—N'104.6 (2)
C8—N—O103.8 (2)C8'—N'—O'103.8 (2)
C8—N—C7111.2 (2)C8'—N'—C7'111.8 (2)
O—N—C7105.4 (2)O'—N'—C7'105.51 (19)
C2—C1—C6109.4 (2)C2'—C1'—C6'109.1 (2)
C2—C1—C11109.5 (2)C2'—C1'—C7'111.1 (2)
C6—C1—C11110.1 (2)C6'—C1'—C7'108.3 (2)
C2—C1—C7112.5 (2)C2'—C1'—C11'108.8 (2)
C6—C1—C7106.4 (2)C6'—C1'—C11'110.1 (2)
C11—C1—C7108.9 (2)C7'—C1'—C11'109.4 (2)
C3—C2—C1112.9 (3)C3'—C2'—C1'112.7 (2)
C3—C2—H2A109.0C3'—C2'—H2'A109.1
C1—C2—H2A109.0C1'—C2'—H2'A109.1
C3—C2—H2B109.0C3'—C2'—H2'B109.1
C1—C2—H2B109.0C1'—C2'—H2'B109.1
H2A—C2—H2B107.8H2'A—C2'—H2'B107.8
C4—C3—C2111.2 (3)C4'—C3'—C2'110.0 (2)
C4—C3—H3A109.4C4'—C3'—H3'A109.7
C2—C3—H3A109.4C2'—C3'—H3'A109.7
C4—C3—H3B109.4C4'—C3'—H3'B109.7
C2—C3—H3B109.4C2'—C3'—H3'B109.7
H3A—C3—H3B108.0H3'A—C3'—H3'B108.2
C3—C4—C5111.5 (3)C5'—C4'—C3'110.9 (2)
C3—C4—H4A109.3C5'—C4'—H4'A109.5
C5—C4—H4A109.3C3'—C4'—H4'A109.5
C3—C4—H4B109.3C5'—C4'—H4'B109.5
C5—C4—H4B109.3C3'—C4'—H4'B109.5
H4A—C4—H4B108.0H4'A—C4'—H4'B108.1
C4—C5—C6111.4 (3)C4'—C5'—C6'112.1 (2)
C4—C5—H5A109.3C4'—C5'—H5'A109.2
C6—C5—H5A109.3C6'—C5'—H5'A109.2
C4—C5—H5B109.3C4'—C5'—H5'B109.2
C6—C5—H5B109.3C6'—C5'—H5'B109.2
H5A—C5—H5B108.0H5'A—C5'—H5'B107.9
C5—C6—C1112.9 (3)C5'—C6'—C1'114.1 (2)
C5—C6—H6A109.0C5'—C6'—H6'A108.7
C1—C6—H6A109.0C1'—C6'—H6'A108.7
C5—C6—H6B109.0C5'—C6'—H6'B108.7
C1—C6—H6B109.0C1'—C6'—H6'B108.7
H6A—C6—H6B107.8H6'A—C6'—H6'B107.6
N—C7—C12104.7 (2)N'—C7'—C12'104.8 (2)
N—C7—C1110.6 (2)N'—C7'—C1'108.3 (2)
C12—C7—C1117.3 (2)C12'—C7'—C1'118.0 (2)
N—C7—H7A108.0N'—C7'—H7'A108.5
C12—C7—H7A108.0C12'—C7'—H7'A108.5
C1—C7—H7A108.0C1'—C7'—H7'A108.5
N—C8—C9111.0 (2)N'—C8'—C9'110.4 (2)
N—C8—H8A109.4N'—C8'—H8'A109.6
C9—C8—H8A109.4C9'—C8'—H8'A109.6
N—C8—H8B109.4N'—C8'—H8'B109.6
C9—C8—H8B109.4C9'—C8'—H8'B109.6
H8A—C8—H8B108.0H8'A—C8'—H8'B108.1
C10—C9—C8116.2 (3)C8'—C9'—C10'115.6 (2)
C10—C9—H9A108.2C8'—C9'—H9'A108.4
C8—C9—H9A108.2C10'—C9'—H9'A108.4
C10—C9—H9B108.2C8'—C9'—H9'B108.4
C8—C9—H9B108.2C10'—C9'—H9'B108.4
H9A—C9—H9B107.4H9'A—C9'—H9'B107.5
C9—C10—C11114.3 (2)C9'—C10'—C11'113.3 (2)
C9—C10—H10A108.7C9'—C10'—H10C108.9
C11—C10—H10A108.7C11'—C10'—H10C108.9
C9—C10—H10B108.7C9'—C10'—H10D108.9
C11—C10—H10B108.7C11'—C10'—H10D108.9
H10A—C10—H10B107.6H10C—C10'—H10D107.7
C10—C11—C1117.6 (2)C10'—C11'—C1'116.6 (2)
C10—C11—H11A107.9C10'—C11'—H11C108.1
C1—C11—H11A107.9C1'—C11'—H11C108.1
C10—C11—H11B107.9C10'—C11'—H11D108.1
C1—C11—H11B107.9C1'—C11'—H11D108.1
H11A—C11—H11B107.2H11C—C11'—H11D107.3
C13—C12—C7102.9 (2)C13'—C12'—C7'102.6 (2)
C13—C12—H12A111.2C13'—C12'—H12C111.3
C7—C12—H12A111.2C7'—C12'—H12C111.3
C13—C12—H12B111.2C13'—C12'—H12D111.3
C7—C12—H12B111.2C7'—C12'—H12D111.3
H12A—C12—H12B109.1H12C—C12'—H12D109.2
O—C13—C14109.4 (2)O'—C13'—C14'107.4 (3)
O—C13—C12103.1 (2)O'—C13'—C12'103.4 (3)
C14—C13—C12114.1 (3)C14'—C13'—C12'116.3 (3)
O—C13—H13A110.0O'—C13'—H13B109.8
C14—C13—H13A110.0C14'—C13'—H13B109.8
C12—C13—H13A110.0C12'—C13'—H13B109.8
C19—C14—C15119.2 (3)C15'—C14'—C19'119.1 (3)
C19—C14—C13121.9 (3)C15'—C14'—C13'123.3 (3)
C15—C14—C13118.8 (3)C19'—C14'—C13'117.4 (3)
C16—C15—C14120.4 (3)C16'—C15'—C14'122.0 (4)
C16—C15—H15A119.8C16'—C15'—H15B119.0
C14—C15—H15A119.8C14'—C15'—H15B119.0
C17—C16—C15120.1 (3)C17'—C16'—C15'120.2 (4)
C17—C16—H16A119.9C17'—C16'—H16B119.9
C15—C16—H16A119.9C15'—C16'—H16B119.9
C16—C17—C18120.0 (3)C16'—C17'—C18'122.1 (3)
C16—C17—H17A120.0C16'—C17'—H17B118.9
C18—C17—H17A120.0C18'—C17'—H17B118.9
C17—C18—C19120.2 (3)C17'—C18'—C19'118.6 (3)
C17—C18—H18A119.9C17'—C18'—H18B120.7
C19—C18—H18A119.9C19'—C18'—H18B120.7
C14—C19—C18120.0 (3)C14'—C19'—C18'117.9 (3)
C14—C19—H19A120.0C14'—C19'—H19B121.0
C18—C19—H19A120.0C18'—C19'—H19B121.0
  5 in total

1.  Characterization of spirolides a, c, and 13-desmethyl c, new marine toxins isolated from toxic plankton and contaminated shellfish.

Authors:  T Hu; I W Burton; A D Cembella; J M Curtis; M A Quilliam; J A Walter; J L Wright
Journal:  J Nat Prod       Date:  2001-03       Impact factor: 4.050

2.  A short history of SHELX.

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

3.  Spirolides isolated from Danish strains of the toxigenic dinoflagellate Alexandrium ostenfeldii.

Authors:  Shawna L MacKinnon; John A Walter; Michael A Quilliam; Allan D Cembella; Patricia Leblanc; Ian W Burton; William R Hardstaff; Nancy I Lewis
Journal:  J Nat Prod       Date:  2006-07       Impact factor: 4.050

4.  (1R,6R)-1-Methyl-8-aza-spiro-[5.6]dodecan-7-one.

Authors:  Stéphanie M Guéret; Ka Wai Choi; Patrick D O'Connor; Peter D W Boyd; Margaret A Brimble
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2008-05-24

5.  Spirolide toxin profile of Adriatic Alexandrium ostenfeldii cultures and structure elucidation of 27-hydroxy-13,19-didesmethyl spirolide C.

Authors:  Patrizia Ciminiello; Carmela Dell'Aversano; Ernesto Fattorusso; Martino Forino; Laura Grauso; Luciana Tartaglione; Franca Guerrini; Rossella Pistocchi
Journal:  J Nat Prod       Date:  2007-11-16       Impact factor: 4.050

  5 in total

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