Tetrahedron letters

Cobalt-catalyzed dimerization of alkenes

CC Wang, PS Lin, CH Cheng

Index: Wang, Chun-Chih; Lin, Pao-Shun; Cheng, Chien-Hong Tetrahedron Letters, 2004 , vol. 45, # 32 p. 6203 - 6206

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Citation Number: 50

Abstract

In the presence of CoX2 (PPh3) 2/3 PPh3 and zinc metal conjugated alkenes (CH2CHCOOR, CH2CHCN, CH2CHSO2Ph and CH2CHCONEt2) undergo reductive tail-to- tail dimerization to yield the corresponding saturated linear products. Under similar reaction conditions, vinylarenes (ArCHCH2) give stereoselective head-to-tail dimerization products, trans-1, 3-diarylbut-1-ene, in good to excellent yields.

~90%

~63%

~87%

~89%

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