Palladium‐Catalyzed Domino Heck/Phosphorylation towards 3,3‐Disubstituted Phosphinonyloxindoles
作者:Guozhang Lu、Xinlei Huangfu、Zi'ang Wu、Guo Tang、Yufen Zhao
DOI:10.1002/adsc.201901100
日期:2019.11.5
The first Pd‐catalyzed domino Heck/phosphorylation of N‐(2‐iodophenyl)acrylamides with secondary phosphine oxides has been developed. The use of PdCl2 as a catalyst, 1,4‐bis(diphenylphosphino)butane as a ligand, K2CO3 as a base, various N‐(2‐iodophenyl)acrylamide derivatives are tolerant in this transformation, affording 3‐phosphinomethyl 3,3‐disubstituted oxindole products in good to excellent yields
N-(2-碘苯基)丙烯酰胺与仲膦氧化物的第一个Pd催化的多米诺Heck /磷酸化反应已经开发出来。在此转化过程中可以耐受使用PdCl 2作为催化剂,1,4-双(二苯基膦基)丁烷作为配体,K 2 CO 3作为碱,各种N-(2-碘苯基)丙烯酰胺衍生物,从而获得3-膦基甲基3,3-二取代的羟吲哚产品,收率良好至优异。这一转变为一步一步形成新的C-C和P-C键,羟吲哚环提供了一条直接途径。而且,该方法可轻松适用于大规模制备。