P− C bond activation chemistry: evidence for 1, 1-carboboration reactions proceeding with phosphorus− carbon bond cleavage

O Ekkert, G Kehr, R Fröhlich…

Index: Ekkert, Olga; Kehr, Gerald; Froehlich, Roland; Erker, Gerhard Journal of the American Chemical Society, 2011 , vol. 133, # 12 p. 4610 - 4616

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Citation Number: 68

Abstract

A series of diarylphosphinyl-substituted acetylenes of the type (aryl) 2P− C C− R (aryl= phenyl or mesityl, R= Ph or n-propyl) react with the strongly Lewis acid reagent B (C6F5) 3 in toluene at elevated temperatures (70− 105° C) to give the 1, 1-carboboration products 4. Treatment of bis (diphenylphosphinyl) acetylene with B (C6F5) 3 under analogous conditions proceeded with phosphinyl migration to yield the 1, 1-carboboration product 4d ...