Cobalt-Catalyzed Carbon-Carbon Bond Formation: Synthesis and Applications of Enantiopure Pyrrolidine Derivatives[1]
作者:Shih-Fan Hsu、Chih-Wei Ko、Yao-Ting Wu
DOI:10.1002/adsc.201100220
日期:2011.7
yields). The scope and limitations of this protocol were examined. The stereochemistry of the pyrrolidines was unaffected by the reaction conditions. The coupling products are important building blocks of phenanthroindolizidine alkaloids. Palladium‐catalyzed formal [4+2] cycloaddition of 2,2′‐diiodobiphenyl with the thus‐generated (S)‐2‐(3‐trimethylsilyl‐2‐propynyl)pyrrolidine gave a good yield of the desilylated
A Concise Palladium-Catalyzed Carboamination Route to (±)-Tylophorine
作者:Lana M. Rossiter、Meagan L. Slater、Rachel E. Giessert、Samuel A. Sakwa、R. Jason Herr
DOI:10.1021/jo902114u
日期:2009.12.18
A total synthesis of the racemic natural product tylophorine [(±)-1] has been demonstrated using the palladium-catalyzed carboamination method developed by Wolfe and co-workers. In this case, an electron-rich aryl bromide 18 was prepared in four steps and subjected to palladium-catalyzed Wolfe carboamination conditions with olefinic carbamate 7 to provide the racemic 2-(arylmethyl)pyrrolidine (±)-19