Synthesis of Functionalized [3], [4], [5] and [6]Dendralenes through Palladium‐Catalyzed Cross‐Couplings of Substituted Allenoates
作者:Daniel J. Lippincott、Roscoe T. H. Linstadt、Michael R. Maser、Bruce H. Lipshutz
DOI:10.1002/anie.201609636
日期:2017.1.16
A mild method for the synthesis of highly functionalized [3]–[6]dendralenes is reported, representing a general strategy to diversely substituted higher homologues of the dendralenes. The methodology utilizes allenoates bearing various substitution patterns, along with a wide range of boron and alkenyl nucleophiles that couple under palladium catalysis leading to sp‐, sp2‐, and sp3‐substituted arrays
报道了一种温和的方法来合成高度官能化的[3] – [6]树枝状烯醛,这代表了多样化替代树枝状烯醛的较高同源物的一般策略。该方法利用了具有各种取代模式的脲基甲酸酯,以及在钯催化下偶联的大量硼和烯基亲核试剂,形成了sp‐,sp 2‐和sp 3‐取代的阵列。证明了新形成的不对称树枝状烯衍生物的区域选择性转化。在水是全局反应介质和室温反应条件的条件下,胶束催化的使用凸显了该技术的绿色本质。