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
可以利用二苯基乙炔的羰基化反应生成(E)-1-硫代1,2-二苯基烷基-1-烯,这些化合物可以与硼酸三异丙基酯原位反应以立体选择性地提供(E)-1,2-二苯基-1-亚烷基硼酸酯酸。这些四取代的乙烯基硼酸充当通用中间体,用于在保留立体化学的情况下生成四取代的烯烃。描述了该方法在(Z)-他莫昔芬和相关类似物的立体选择性合成中的应用。