Tetrahedron

gem-Difluorocyclopropenes by [1+ 2] cycloaddition reactions between difluorocarbene and acetylenes having terminal or internal triple bonds

Y Bessard, M Schlosser

Index: Bessard, Yves; Schlosser, Manfred Tetrahedron, 1991 , vol. 47, # 35 p. 7323 - 7328

Full Text: HTML

Citation Number: 36

Abstract

Difluorocarbene, generated by the Burton method, ie by the dissociation of (triphenylphosphonio) difluoromethanide, was found to add to terminal or internal acetylenes with astonishing ease. Actually, it reacts roughly 10 times faster with 4-octyne than with cis-4-octene. The gem-difluorocyclopropenes resulting from the [1+ 2] cycloaddition process can be isolated with good to excellent yields. They are perfectly ...