π-facial selectivity in the formation of tricarbonylchromium(0) complexes of estra-1,3,5(10),6-tetraenes

被引：4
作者：
Dongol, KG
Silva, MCME
Matsubara, K
Matsumoto, T
Mataka, S
Thiemann, T
机构：
[1] Kyushu Univ, Inst Adv Mat Study, Fukuoka, Japan
[2] Inst Tecnol & Nucl, Sacavem, Portugal
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2003年 / 629卷 / 06期
关键词：
steroids; pi-facial selectivity; chromium; alkene; directive effects;
D O I：
10.1002/zaac.200300017
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The preparation of two eta(6)-estra-1,3,5(10),6-tetraene tricarbonylchromium complexes 4 and 6 are described. In both cases only one stereoisomer can be isolated, in contrast to other estrane-tricarbonylchromium complexes, where complexations are non-stereoselective. X-ray crystal structural analysis of 4 discloses that only the more sterically hindered beta-facial isomer is formed. It is assumed that the 6,7-olefinic moiety exerts a directive influence on the complexation.
引用
收藏
页码：945 / 947
页数：3
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