Synthesis of Allylic and Propargylic Trifluoromethyl Thioethers by Copper(I)-Catalyzed Trifluoromethylthiolation of Allylic Bromides and Propargylic Chlorides
作者:Mingguang Rong、Dongzhe Li、Ronglu Huang、Yangjie Huang、Xiaoyan Han、Zhiqiang Weng
DOI:10.1002/ejoc.201402480
日期:2014.8
copper(I)-catalyzed trifluoromethylthiolation of allylic bromides by using elemental sulfur and CF3SiMe3. This rate of this transformation was significantly accelerated in the presence of 18-crown-6, and the reaction afforded the desired products in moderate to excellent yields with high stereo- and regioselectivity. This method can tolerate a number of functional groups and provides facile access to a variety
报道了一种使用元素硫和 CF3SiMe3 对烯丙基溴进行铜 (I) 催化的三氟甲基硫醇化反应的有效方法。在 18-crown-6 的存在下,这种转化速度显着加快,反应以中等至极好的收率提供了所需的产物,具有高立体选择性和区域选择性。这种方法可以容忍许多官能团,并且可以轻松获得各种烯丙基三氟甲基硫醚。还研究了铜 (I) 催化的炔丙基氯化物的三氟甲硫基化反应。提出了一种涉及烯丙基铜 (III) 中间体的合理机制。