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。
Visible-Light-Induced Cascade Reaction of Isocyanides and <i>N</i>-Arylacrylamides with Diphenylphosphine Oxide via Radical C–P and C–C Bond Formation
作者:Chun-Xiao Li、De-Shuang Tu、Rui Yao、Hong Yan、Chang-Sheng Lu
DOI:10.1021/acs.orglett.6b02413
日期:2016.10.7
An effective photoredox-mediated tandem phosphorylation/cyclization reaction of diphenylphosphine oxide with three types of radical acceptors leads to P(O)Ph2-containing phenanthridines, isoquinolines, and indolin-2-ones by formation of both C–P and C–C bonds. [Ir(ppy)2(dtbpy)]PF6 (1 mol %) was used as the catalyst, CsF or Cs2CO3 as the base, and K2S2O8 as the oxidant. A series of functional groups
有效的光氧化还原介导的二苯基氧化膦与三种类型的自由基受体的串联磷酸化/环化反应可通过形成C–P和C–C形成含P(O)Ph 2的菲啶,异喹啉和吲哚-2-酮债券。使用[Ir(ppy)2(dtbpy)] PF 6(1 mol%)作为催化剂,使用CsF或Cs 2 CO 3作为碱,使用K 2 S 2 O 8作为氧化剂。在室温下可以耐受一系列官能团。产生了中等至良好的产量。
Metal-free oxidative arylphosphination of activated N-substituted-N-arylacrylamide derivatives using K2S2O8
作者:Ya-Min Li、Yuehai Shen、Kwen-Jen Chang、Shang-Dong Yang