Palladium-Tetraphosphine Complex Catalysed Heck Reaction of Vinyl Bromides with Alkenes: A Powerful Access to Conjugated Dienes
作者:Henri Doucet、Maurice Santelli、Mhamed Lemhadri、Ahmed Battace、Florian Berthiol、Touriya Zair
DOI:10.1055/s-2008-1032124
日期:——
A wide variety of 1,3-dienes have been prepared by the Heck vinylation of vinyl bromides using [Pd(η 3 -C 3 H 5 )Cl] 2 / CIS, CIS, CIS-1,2,3,4-tetrakis[(diphenylphosphino)methyl]cyclopentane (Tedicyp) as the catalyst precursor. Both α- and β-substituted vinyl bromides undergo the Heck reaction with functionalised alkenes such as acrylates, enones, styrenes or a vinyl sulfone, and also with nonfunctionalised
使用 [Pd(η 3 -C 3 H 5 )Cl] 2 / CIS, CIS, CIS-1,2,3,4-tetrakis 通过乙烯基溴化物的 Heck 乙烯基化制备了多种 1,3-二烯[(二苯基膦基)甲基]环戊烷(Tedicyp)作为催化剂前体。α- 和 β- 取代的溴化乙烯都与官能化烯烃(如丙烯酸酯、烯酮、苯乙烯或乙烯基砜)以及非官能化烯烃(如 dec-1-ene)发生 Heck 反应,在大多数情况下,立体选择性导致相应的 E- 或 E, E-1,3-二烯,收率良好。此外,这种催化剂可以在低负载下用于多种反应。