Palladium(0)-Mediated Preparation of<i>trans</i>-4-Substituted-1-(phthalimido)-2-cyclopentenes
作者:Frederick A. Luzzio、Alexander V. Mayorov
DOI:10.1055/s-2003-37516
日期:——
The series of title compounds were found to be conveniently available from the corresponding trans-4-chloro-1-(phthalimido)-2-cyclopentene. The allylic chlorocycloalkene was found to be an excellent substrate for Pd(0)-mediated acyloxylation with the salts of carboxylic acids. Using the allylic chlorocycloalkene as a coupling partner, the Pd(0)-mediated alkylation with active methylene compounds was facilitated in variable yields by promotion with organic bases such as DBU and 1,1,3,3-tetramethylguanidine. Using the Pd(0)-mediated protocol, the product 4-substituted-trans-1-phthalimido-2-cyclopentenes were obtained in modest to excellent yields overall.
一系列标题化合物被发现可方便地从相应的trans-4-氯-1-(呋喃酰胺)-2-环戊烯中获得。该烯丙基氯环烯烃被发现是Pd(0)介导的羧酸盐酰氧化反应的优良底物。使用烯丙基氯环烯烃作为耦合伙伴,通过有机碱(如DBU和1,1,3,3-四甲基氨基脲)的促进,Pd(0)介导的活性亚甲基化反应获得了可变的产率。在Pd(0)介导的反应过程中,最终获得4取代的trans-1-呋喃酰胺-2-环戊烯,整体产率从中等到优秀。