Studies on Chromium(0)-Promoted Higher-Order Cycloaddition-Based Benzannulation. Total Synthesis of (+)-Estradiol
作者:James H. Rigby、Namal C. Warshakoon、Anne J. Payen
DOI:10.1021/ja991016w
日期:1999.9.1
featuring [6π + 4π] cycloaddition of (η6-thiepin 1,1-dioxide)tricarbonylchromium(0) complexes with highly substituted dienes followed by Ramberg−Backlund rearrangement has been developed. Enantiomerically pure (+)-estradiol (estra-1,3,5(10)-triene-3,17β-diol) has been synthesized by employing a higher-order cycloaddition between an appropriately substituted thiepin dioxide chromium(0) complex and a diene
已经开发了一种苯环化序列,其特征是 (η6-thiepin 1,1-二氧化物) 三羰基铬 (0) 配合物与高度取代的二烯进行 [6π + 4π] 环加成,然后进行 Ramberg-Backlund 重排。对映体纯 (+)-雌二醇 (estra-1,3,5(10)-triene-3,17β-diol) 已通过在适当取代的二氧化硫铬 (0) 络合物和源自对映异构纯茚二酮前体的二烯伙伴作为关键环构建事件。随后对该环加合物的 Ramberg-Backlund 重排和常规官能团交换提供了类固醇目标。