A Cooperative Copper- and Palladium-Catalyzed Three-Component Coupling of Benzynes, Allylic Epoxides, and Terminal Alkynes
作者:Masilamani Jeganmohan、Sivakolundu Bhuvaneswari、Chien-Hong Cheng
DOI:10.1002/anie.200804873
日期:2009.1.2
A little cooperation: A cooperative copper‐ and palladium‐catalyzed highly regio‐ and chemoselective three‐component coupling of benzynes, allylic epoxides, and terminal alkynes provides an efficient atom‐economical route to ortho‐disubstituted arenes. The resulting product undergoes a gold‐catalyzed cyclization reaction (see scheme; dba=dibenzylideneacetone, dppp=1,3‐bis(diphenylphosphanyl)propane)
一点合作:铜和钯的协同催化的苯炔,烯丙基环氧化物和末端炔烃的高区域和化学选择性三组分偶联为邻二取代的芳烃提供了一条有效的原子经济途径。所得产物进行金催化的环化反应(参见方案; dba =二亚苄基丙酮,dppp = 1,3-双(二苯基膦基)丙烷)。