Synthesis of Dienes by Palladium-Catalyzed Couplings of Tosylhydrazones with Aryl and Alkenyl Halides
作者:José Barluenga、María Tomás-Gamasa、Fernando Aznar、Carlos Valdés
DOI:10.1002/adsc.201000700
日期:2010.12.17
coupling partners can be employed for the synthesis of conjugated dienes by palladium-catalyzed cross-coupling with tosylhydrazones: α,β-unsaturated ketone and aryl halide or alkenyl halide and non-conjugated tosylhydrazone. Depending on the substrate, a vinylogous hydride elimination is responsible for the formation of the final dienes.
偶联伙伴的两种不同组合可用于通过钯催化与甲苯磺酰hydr的交叉偶联来合成共轭二烯:α,β-不饱和酮和芳基卤化物或烯基卤化物和非共轭甲苯磺酰zone。取决于基材,乙烯基二氢化物的消除是最终二烯形成的原因。