作者:Joseph P. Marino、Hanh Nho Nguyen
DOI:10.1021/jo0110146
日期:2002.9.1
described in which a Michael addition of an alkyl or aryl tellurolate anion occurs onto an activated alkyne with subsequent trapping of a vinyl anion with electrophiles (aldehydes and ketones) other than a proton. This process provides an efficient regio- and stereospecific route to tri- and tetrasubstituted alkenes. Methodologically significant examples of this chemistry were studied in which aryl and alkyl
描述了一种新颖的电遥测方法,其中烷基或芳基碲酸根阴离子的迈克尔加成发生在活化的炔上,随后用质子以外的亲电子试剂(醛和酮)捕获乙烯基阴离子。该方法为三和四取代的烯烃提供了有效的区域和立体有择途径。研究了该化学方法学上的重要实例,其中在迈克尔反应中将芳基和烷基碲酸根阴离子添加到ω-酮炔基酯中,初始乙烯基阴离子被内部醛分子内捕获。反应中心被不同长度的烷基链束缚,以适度到良好的产率形成高度官能化的五,六,七和八元环。