氟烷基化和氟烷氧基化的研究 32.铜存在下氟砜基二氟碘甲烷与烯烃的反应——一个电子转移引发同时存在自由基和卡宾的过程

Studies on Fluoroalkylation and Fluoroalkoxylation 32.The Addition Reactions of Difluoroiodomethane sulfonyl Fluoride with Olefine in the Presence of Copper——Coexistence of Radical and Carbene Processes Induced by Electron Transfer

在催化量的铜粉存在下,氟砜基二氟碘甲烷在DG、乙酐或不加溶剂时与烯烃反应,得到加成产物(3,4)和三元环产物。对反应机理作了初步探讨,3,4经自由基加成得到而三元环产物是涉及二氟卡宾中间体。

In the presence of copper, difluoroiodomethane sulfonyl fluoride (?)eacted with olefins to give the 1:1 addacts and cyclopropane derivatives, as well as CF_3I; ICF_2H, and I_2CF_2 in DG, acetic anhydride or in the absence of solvent. The mechanistiic study shows that the addition products are formed by a radical chain process, and the others, involving difluorocarbene intermediate.