(1S,2E,6R,7aR)-2-Benzylidene-1,6-dihydroxy-2,3,5,6,7,7a-hexahydro-1H-pyrrolizin-3-one
نویسندگان
چکیده
In the title compound, C(14)H(15)NO(3), the conformation of the double bond was determined to be E, confirming the result obtained from two-dimensional NMR data. The five-membered rings of the pyrrolizine unit exhibit C-envelope conformations, with C atoms displaced from the mean planes formed by the remaining rings atoms by 0.1468 (15) and 0.5405 (17) Å. The mean planes of these rings (through all ring atoms) have a dihedral angle of 49.03 (10)°. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds. The absolute configuration of the mol-ecule was established, as judged by the, as judged by the obtained values for the Hooft and Flack parameters.
منابع مشابه
(1S,2E,6R,7aR)-1,6-Dihydroxy-2-(4-nitrobenzylidene)-2,3,5,6,7,7a-hexahydro-1H-pyrrolizin-3-one
The crystal structure of the title compound, C(14)H(14)N(2)O(5), contains two distinct conformers in the asymmetric unit. The compound has three defined stereocenters, two of them contiguous, and a C=C double bond with an E conformation. The stereocenters exhibit the same chirality in both conformers, with significant differences in the conformation of the five-membered rings of the pyrrolizine...
متن کامل(1S,2S,6R,7aR)-2-Benzyl-1,6-dihydroxyhexahydropyrrolizin-3-one
In the title compound, C(14)H(17)NO(3), the dihedral angles show that the H atoms at two stereocenters are in a trans-diaxial configuration. In the crystal, the molecules are linked by O-H⋯O hydrogen bonds. The absolute configuration of the molecule has been established on the basis of refinement of the Hooft and Flack parameters.
متن کامل(1S,2R,6R,7aS)-1,2,6-Trihydroxyhexahydro-1H-pyrrolizin-3-one
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متن کامل(3aR*,6S*,7aR*)-7a-Chloro-6-methyl-2-(4-methylphenylsulfonyl)-2,3,3a,6,7,7a-hexahydro-3a,6-epoxy-1H-isoindole
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متن کامل(2aR*,5S*,6aS*,8aS*,E)-Ethyl 5-hydroxy-7,7,8a-trimethyl-8-oxo-2,2a,6,6a,7,8,8a,8b-octahydro-1H-pentaleno[1,6-bc]oxepine-4-carboxylate
The title compound, C17H24O5, featuring a 2-carbeth-oxy-3-oxepanone unit in its intra-molecularly O-H⋯O hydrogen-bonded enol form, was obtained via [(CF3CO2)2Rh]2-catal-ysed intra-molecular O-H bond insertion in the α-diazo-ω-hy-droxy-β-ketoester, ethyl 4-[(1S,3aS,6R,6aS)-6-hy-droxy-2,2,3a-trimethyl-3-oxo-octa-hydro-penta-len-1-yl]-2-diazo-3-oxobutano-ate. The seven-membered oxacyclic ring, thu...
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عنوان ژورنال:
دوره 68 شماره
صفحات -
تاریخ انتشار 2012