Unusual reaction of sulphur tetrafluoride: conversion of the methyl group into difluoromethyl and trifluoromethyl groups
作者:I. Nowak、W. Dmowski、W.A. Manko
DOI:10.1016/0022-1139(95)03331-8
日期:1995.12
The reaction of 2,5-dimethyl-3,4-furandicarboxylic acid (1) with sulphur tetrafluoride gave crystalline 2,5-dimethyl-4-trifluoromethyl-3-furanoyl fluoride (2) and a liquid composed of 2-methyl-5-difluoromethyl-3,4-bis(trifluoromethyl)furan (4), 2-methyl-3,4,5-tris(trifluoromethyl)furan (5) and only small amounts of the expected 2,5-dimethyl-3,4-bis(trifluoromethyl)furan (3).
2,5-二甲基-3,4-呋喃二甲酸(1)与四氟化硫的反应生成结晶的2,5-二甲基-4-三氟甲基-3-呋喃酰氟(2)和由2-甲基-5组成的液体-二氟甲基-3,4-双(三氟甲基)呋喃(4),2-甲基-3,4,5-三(三氟甲基)呋喃(5)和少量的预期2,5-二甲基-3,4 -双(三氟甲基)呋喃(3)。