α-fluoroenals is described to undergo the in situ formation of difluorocarbene and silyl enol ether, difluorocyclopropanation, desilylation, ring-opening, and defluorination sequence. In this tandem reaction, Me3SiCF2Br acts as not only the difluorocarbene source but also the TMS transfer agent as well as internal bromide and fluoride anion catalyst. It allows the transformations to occur smoothly under only
可烯化的羰基化合物与Me 3 SiCF 2 Br的独特的多米诺反应,以构建α-
氟烯和α-
氟烯,被描述为原位形成
二氟卡宾和甲
硅烷基烯醇醚,二
氟环丙烷化,甲
硅烷基化,开环和脱
氟序列。在该串联反应中,Me 3 SiCF 2 Br不仅充当
二氟卡宾源,而且还充当TMS转移剂以及内部
溴化物和
氟化物阴离子催化剂。它允许仅在催化量的n -Bu 4 NBr作为
引发剂的情况下平稳地进行转变。