Synlett

Isomerization of Electron-Poor Alkynes to the Corresponding (E, E)-1, 3-Dienes Using a Bifunctional Polymeric Catalyst Bearing Triphenylphosphine and Phenol …

CKW Kwong, MY Fu, HCH Law, PH Toy

Index: Kwong, Cathy Kar-Wing; Fu, Michael Yunyi; Law, Henry Chun-Hin; Toy, Patrick H. Synlett, 2010 , # 17 p. 2617 - 2620

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Citation Number: 11

Abstract

Abstract The use of a bifunctional non-cross-linked polystyrene bearing both phosphine and phenol groups for the organocatalytic isomerization of alkynes bearing electron-withdrawing ester substituents to afford the corresponding (E, E)-dienes in excellent yield and stereoselectivity is described. When polystyrene functionalized with only phosphine groups was used as the catalyst, either low or no yield of the desired product was obtained. Thus ...