Regiocontrolled synthesis of cis-enediynes via intramolecular trapping of allylic cations
作者:Wei-Min Dai、Mavis Yuk Ha Lee
DOI:10.1016/s0040-4039(98)01834-6
日期:1998.10
Trapping of allylic cations possessing 1,2-dialkynyl groups by an external nucleophile such as ROH yields cis-enediynes in a regioselective manner; while similar allylic cations react with an internal nucleophilic group to afford exclusively cis-enediynes. This regiocontrolled allylic rearrangement has been used successfully in the synthesis of a number of 2,5-dihydro-2-benzofuryl cis-enediynes5 and