Copper-Catalyzed Sulfenylation, Sulfonylation, and Selenylation of 2,3-Allenoic Acids with Disulfides or Diselenides
作者:Ya-Xun Xin、Shen Pan、Yangen Huang、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acs.joc.8b00858
日期:2018.6.1
The efficient copper-catalyzed sulfenylation and selenylation of 2,3-allenoic acids with disulfides or diselenides were developed, respectively. These reactions proceeded through tandem radical addition/intramolecular cyclization processes, affording a series of 4-sulfenylated and 4-selenylated butenolides in moderate to excellent yields. Moreover, 4-sulfonylated butenolides could also be obtained
分别开发了有效的铜催化的二硫化物或二硒化物的2,3-烯丙基酸的亚磺酰基化和硒基化反应。这些反应通过串联自由基加成/分子内环化过程进行,以中等至优异的产率提供了一系列的4-亚磺酰基化和4-硒化的丁烯内酯。此外,还可以通过2,3-烯丙酸的亚磺酰基化和随后的氧化来获得4-磺酰化的丁烯内酯。含硫和硒的丁烯内酯的进一步转化以良好的产率提供了相应的呋喃衍生物。