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-ordercycloaddition between an appropriately substituted thiepin dioxide chromium(0) complex and a diene