Asymmetric synthesis of trifluoromethylated propargylamines via 1,2-additions of trifluoromethylacetylide to N-tert-butanesulfinyl imines
作者:Xian-Yin Chen、Xiao-Long Qiu、Feng-Ling Qing
DOI:10.1016/j.tet.2008.01.021
日期:2008.3
An efficient method for the asymmetric synthesis of the trifluoromethylated propargylamines was described. Addition of lithium trifluoromethylacetylide, in situ prepared from lithium diisopropylamide and the 2-bromo-3,3,3-trifluoropropene, to various N-tert-butanesulfinyl imines provided a range of trifluoromethylated propargyl sulfinamides. Besides high yields and excellent diastereoselectivities
描述了一种不对称合成三氟甲基化炔丙基胺的有效方法。加入锂trifluoromethylacetylide,原位从二异丙氨基锂和2-溴-3,3,3-三氟丙烯制备各种ñ -叔-butanesulfinyl亚胺提供了一系列的三氟甲基化炔丙基亚磺酰胺。除了高收率和优异的非对映选择性外,添加的特征还在于当使用极性或非极性溶剂时,非对映选择性可以逆转。叔丁烷亚磺酰基的酸性裂解可提供高度光学纯的三氟甲基化炔丙基胺。