Synthesis of 3,4-Disubstituted 2H-Benzopyrans through C−C Bond Formation via Electrophilic Cyclization
摘要:
[GRAPHIC]The electrophilic cyclization of substituted propargylic aryl ethers by I-2, ICl, and PhSeBr produces 3,4-disubstituted 2H-benzopyrans in excellent yields. This methodology results in vinylic halides or selenides under mild reaction conditions and tolerates a variety of functional groups, including methoxy, alcohol, aldehyde, and nitro groups.
Synthesis of 3,4-Disubstituted 2<i>H</i>-Benzopyrans through C−C Bond Formation via Electrophilic Cyclization
作者:Shilpa A. Worlikar、Tanay Kesharwani、Tuanli Yao、Richard C. Larock
DOI:10.1021/jo062234s
日期:2007.2.1
[GRAPHIC]The electrophilic cyclization of substituted propargylic aryl ethers by I-2, ICl, and PhSeBr produces 3,4-disubstituted 2H-benzopyrans in excellent yields. This methodology results in vinylic halides or selenides under mild reaction conditions and tolerates a variety of functional groups, including methoxy, alcohol, aldehyde, and nitro groups.