作者:Phil Ho Lee、Sundae Kim、Kooyeon Lee、Dong Seomoon、Hyunseok Kim、Seokju Lee、Misook Kim、Mijeong Han、Kwanghyun Noh、Tom Livinghouse
DOI:10.1021/ol048175r
日期:2004.12.1
[Graphics]The cyclization of 1-bromo-2,7- and 1-bromo-2,8-enynes mediated by indium in DMF produced five- and six-membered cyclic compounds. Although KI was a necessary additive in the cyclization of terminal 1-bromo-2,7-enynes to give the desired products at 25degreesC, reactions of terminal 1-bromo-2,8-enynes and internal 1-bromo-2,7-enynes with indium proceeded at 100degreesC in DMF without KI. After cyclizations, subsequent cross-coupling reaction and iodolysis increase the usefulness of this reaction.