A new and general one-pot transformation of aromatic aldehydes to fluorinated olefins containing -CH=C(Cl)CF3 or -CH=C(F)CClF2 moieties is described. Freons CCl3CF3 and CCl2FCCIF2 were used as trifluoromethyl and difluoromethyl C-2-building blocks respectively. A proposed mechanism for the reaction is discussed. (C) 2001 Elsevier Science Ltd. Ali rights reserved.
Chlorotrifluoroethylidenes: an efficient and convenient approach to their synthesis
作者:Abhay Atmaram Upare、Pradip K. Gadekar、Kiran Jadhav、H. Sivaramakrishnan、Selvaraj Mohana Roopan
DOI:10.1039/d0ra02481c
日期:——
A convenient one step synthesis of chlorotrifluoroalkyl olefins starting from aldehydes was developed. The stable reagent 2-((1-chloro-2,2,2-trifluoroethyl)sulfonyl)benzothiazole was prepared from readily available benzothiazole-2-thiol and halothane. This method comprises using stable 2-((1-chloro-2,2,2-trifluoroethyl)sulfonyl)benzothiazole according to the Julia procedure and presents new opportunities