作者:Yigang He、David M. Lemal
DOI:10.1016/s0022-1139(02)00274-9
日期:2003.1
4,4-Difluoropyrazolidine-3,5-dione was synthesized as a precursor for the corresponding pyrazolinedione, envisioned as a photochemical source of difluorocarbene. However, this azo compound proved to be far too unstable. In contrast, 10,10-difluorobicyclo[4.3.1]deca-1,3,5-triene, readily synthesized from indane, was found to be a practical source of difluorocarbene for photochemical as well as thermal cyclopropanation reactions. (C) 2002 Elsevier Science B.V All rights reserved.