Total Synthesis of (+)-Dihydrocuscohygrine and Cuscohygrine
作者:Christian Stapper、Siegfried Blechert
DOI:10.1021/jo025666l
日期:2002.9.1
The first enantioselective synthesis of (+)-dihydrocuscohygrine 1 and cuscohygrine 2 is presented. 1 was obtained in nine steps and 30% overall yield with a ruthenium-catalyzed tandem ring rearrangement metathesis key step starting from enantiomerically pure cycloheptene-1,3,5-triol derivative 6. The unknown absoluteconfiguration of natural dihydrocuscohygrine 1 could be determined as (S,S)-(-). Cuscohygrine