Vanadium-Catalyzed Synthesis of Geometrically Defined Acyclic Tri- and Tetrasubstituted Olefins from Propargyl Alcohols
作者:Barry M. Trost、Jacob S. Tracy
DOI:10.1021/acscatal.8b04567
日期:2019.2.1
selective formation of geometrically defined acyclic tri- and tetrasubstituted alkenes from inexpensive and readily available propargyl alcohols is described. Through vanadium oxo catalysis, tri- and tetrasubstituted α-chloro-, bromo-, and iodo-enone olefins can be synthesized with the kinetic E-geometry. Complementary tetrasubstituted β-chloro-, bromo-, and iodo-enone olefins with Z-geometry can be
描述了由廉价且容易获得的炔丙醇高度选择性地形成几何定义的无环三和四取代的烯烃。通过钒氧催化,可以通过动力学E-几何构型合成三和四取代的α-氯代,溴代和碘代烯酮烯烃。具有Z-几何形状的互补四取代的β-氯代,溴代和碘代烯酮烯烃可通过无金属的1,2-芳基转移获得。这些几何定义的乙烯基卤化物的实用性通过交叉偶联反应形成全碳四取代烯烃而几乎完全保留起始烯烃几何形状,以及通过(±)-甲基肌酮的全合成得到了证明。