Carbolithiation of Diphenylacetylene as a Stereoselective Route to (<i>Z</i>)-Tamoxifen and Related Tetrasubstituted Olefins
作者:Neola F. McKinley、Donal F. O'Shea
DOI:10.1021/jo061949s
日期:2006.12.1
Carbolithiation of diphenylacetylene can be exploited to generate (E)-1-lithio-1,2-diphenylalkyl-1-enes which can be reacted in situ with triisopropylborate to stereoselectively provide (E)-1,2-diphenyl-1-alkylene boronic acids. These tetrasubstituted vinylboronic acids served as versatile intermediates for the generation of tetrasubstituted olefins with retention of stereochemistry. The application