P–C Bond formation via direct and three-component conjugate addition catalyzed by 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD)
作者:Zhiyong Jiang、Yan Zhang、Weiping Ye、Choon-Hong Tan
DOI:10.1016/j.tetlet.2006.11.019
日期:2007.1
The direct addition of P(O)–H bonds (dialkylphosphites and diphenyl phosphonite) across various activated alkenes was catalyzed effectively by 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). This is a mild, rapid and efficient protocol to generate P–C bonds. This simple procedure allows a series of dialkylalkylphosphonates and trisubstituted phosphine oxides to be prepared in high yields. Further investigation
Palladium(II)-Catalyzed Conjugate Phosphination of Electron-Deficient Acceptors
作者:Verena T. Trepohl、Susumu Mori、Kenichiro Itami、Martin Oestreich
DOI:10.1021/ol8028466
日期:2009.3.5
A general protocol for the conjugate transfer of diphenyl-, dicyclohexyl-, and di-tert-butylphosphinyl groups from silylphosphlnes to cyclic and acyclic electron-deficient acceptors employing a bench-stable palladium(II) catalyst Is reported. Several E and Z configured alpha,beta-unsaturated carbonyl and carboxyl acceptors (including imides) as well as nitroalkenes participate in this palladium(II)-catalyzed process in high chemical yields.