Organocatalytic Nucleophilic Ring Opening of Cyclopropanecarbaldehydes by Benzenethiols: Tandem Synthesis of Benzo[b]thiepines
作者:Quanrui Wang、Liangxi Li、Zhiming Li
DOI:10.1055/s-0029-1217370
日期:2009.7
An unprecedented nucleophilic ring opening of cyclopropanecarbaldehydes with benzenethiols proceeds regioselectively under the catalysis of 40 mol% proline to afford fair to good yields of 4-phenylthio-substituted butyraldehydes. If o-thiosalicyl-aldehydes are employed, a tandem homoconjugate addition―aldol reaction occurs, which constitutes an expedient entry to pharmaceutically valuable 2,3-dihy