Cobalt(I)-catalyzed 1,4-Hydrovinylation Reactions of 1,3-Dienes with Functionalized Terminal Alkenes under Mild Conditions
作者:Gerhard Hilt、Steffen Lüers
DOI:10.1055/s-2002-23549
日期:——
of acyclic 1,3-dienes with various functionalized terminal alkenes is described. The mild reaction conditions are significant because they considerably reduce the amount of side products and for non acceptor-substituted alkenes the branched products are formed exclusively. The CoBr 2 (dppe) catalyst system controls the regiochemistry of the hydrovinylation process. Unsymmetrical 1,3-dienes yield products
描述了钴催化的无环 1,3-二烯与各种官能化末端烯烃的 1,4-氢化乙烯基化。温和的反应条件很重要,因为它们大大减少了副产物的数量,并且对于非受体取代的烯烃,仅形成支化产物。CoBr 2 (dppe) 催化剂体系控制加氢乙烯基化过程的区域化学。不对称的 1,3-二烯产生产物,其中新的碳-碳键在 1,3-二烯的较少取代端形成。