Stereoselective synthesis of vinylphosphonates and phosphine oxides via silver-catalyzed phosphorylation of styrenes
作者:Qingwen Gui、Liang Hu、Xiang Chen、Jidan Liu、Ze Tan
DOI:10.1039/c5cc04826e
日期:——
An efficient and stereoselectivesynthesis of vinylphosphonates and phosphine oxides was developed starting from styrenes using AgNO3 as the catalyst and K2S2O8 as the oxidant. Various vinyl-phosphonates and phosphine oxides were synthesized in good yields with excellent regioselectivity.
从苯乙烯开始,使用AgNO 3作为催化剂,K 2 S 2 O 8作为氧化剂,开发了一种有效的立体选择性合成乙烯基膦酸酯和氧化膦的方法。以良好的产率和优异的区域选择性合成了各种乙烯基膦酸酯和氧化膦。
Synthesis of diethyl 2-(aryl)vinylphosphonates by the Heck reaction catalysed by well-defined palladium complexes
Pd-catalysed procedures for the direct Heck arylation of diethyl vinylphosphonate with various aryl or heteroaryl halides toward the synthesis of diethyl2-(aryl)vinylphosphonates are reported. Several homogeneous catalytic systems (i.e. Herrmann palladacycle, Nolan (NHC)-palladium catalyst, Pd(OAc)2/PPh3) were used and compared within the study. High conversions and selectivities were achieved under
报道了钯催化的乙烯基膦酸二乙酯与各种芳基或杂芳基卤化物直接进行Heck芳基化反应以合成2-(芳基)乙烯基膦酸二乙酯的方法。在研究中使用了几种均相催化体系(即,Herrmann palladacycle,Nolan(NHC)-钯催化剂,Pd(OAc)2 / PPh 3)。无论使用何种均相催化剂,在最佳条件下(2摩尔%[Pd],NMP,K 2 CO 3和140°C)都可以实现高转化率和选择性。