A catalytic method for the direct cross-coupling of alkenyllithium reagents with aryl and alkenyl halides is described. The use of a catalyst comprising Pd2(dba)3/XPhos allows for the stereoselective preparation of a wide variety of substituted alkenes in high yields under mild conditions. In addition (1-ethoxyvinyl)lithium can be efficiently converted into substituted vinyl ethers which, after hydrolysis
描述了烯基
锂试剂与芳基和烯基卤化物直接交叉偶联的催化方法。使用包含Pd 2 (dba) 3 /XPhos的催化剂允许在温和条件下以高产率立体选择性制备多种取代的烯烃。此外,(1-乙氧基
乙烯基)
锂可以有效地转化为取代的
乙烯基醚,其在
水解后可以在一锅法中容易地获得相应的甲基酮。