Regio- and stereoselective synthesis of Z-vinylic tellurides from propargylic alcohols: a route to chiral Z-enynes
作者:Cristiano Raminelli、Nathalia C. da Silva、Alcindo A. Dos Santos、André L.M. Porto、Leandro H. Andrade、João V. Comasseto
DOI:10.1016/j.tet.2004.10.087
日期:2005.1
tert-Butyldimethylsilyl ethers of propargylic alcohols are hydrotellurated regioselectively to give 1,2-Z-vinylic tellurides. Enantiomerically pure propargylic alcohols give enantiomerically pure vinylic tellurides, which are coupled with alkynes under Pd catalysis to give enantiomerically pure allylic enynols.
炔丙醇的叔丁基二甲基甲硅烷基醚区域选择性地氢加氢酯化,得到1,2- Z-乙烯基碲化物。对映体纯的炔丙醇得到对映体纯的乙烯基碲化物,其在Pd催化下与炔烃偶联,得到对映体纯的烯丙基烯醇。