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CONFORMATIONAL DEFORMATION OF RING C IN 14-BETA-ESTRA-1,3,5(10),15-TETRAEN-17-ONES

被引：7
作者：
BULL, JR
DILLEN, JLM
SEFTON, MA
机构：
[1] UNIV PRETORIA,DEPT CHEM,PRETORIA 0002,SOUTH AFRICA
[2] AUSTRALIAN WINE RES INST,URRBRAE,SA,AUSTRALIA
来源：
TETRAHEDRON | 1990年 / 46卷 / 24期
关键词：
D O I：
10.1016/S0040-4020(01)81470-8
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
High-field n.m.r. analysis of four 3-methoxy-14β-estra-1,3,5(10), 15-tetraen-17-ones provides evidence for conformational deformation of ring C to a twist-boat form in solution. These observations are supported by molecular mechanics (MM2) calculations, which predict that the ring C chair and ring C twist-boat conformers have similar steric energies, slightly favouring the latter. An X-ray crystal structure determination on 3-methoxy-14-methyl-14β-estra-1,3,5(10), 15-tetraen-17-one revealed that ring C does indeed adopt a twist-boat conformation in the solid state. © 1990.
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页码：8143 / 8152
页数：10
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