Recyclable Palladium-Catalyzed Carbonylative Coupling of Aryl Halides and Organoaluminum Compounds with tert-Butyl Isocyanide as CO Equivalent Leading to 1,2-Diketones
An efficient heterogeneous palladium-catalyzed carbonylative coupling of arylhalides and organoaluminum compounds has been developed using tert-butyl isocyanide as CO equivalent. The carbonylation reaction proceeds smoothly in toluene with KOtBu as a base at 100 °C by using 10 mol% of an SBA-15-anchored bidentate phosphine palladium(0) complex [2P-SBA-15-Pd(0)] as the catalyst and provides a general
使用叔丁基异氰化物作为CO当量,开发了芳基卤化物和有机铝化合物的高效非均相钯催化羰基化偶联。使用 10 mol% 的 SBA-15 锚定二齿膦钯 (0) 络合物 [2P-SBA-15-],以 KO t Bu 为碱,在甲苯中于 100 °C 下,羰基化反应顺利进行。 Pd(0)]作为催化剂,为1,2-二酮的组装提供了一种通用且实用的方法,且收率良好。这种多相钯催化剂可以通过简单的离心过程轻松分离和回收,并可重复使用七个以上循环,且催化效率几乎一致。