Ruthenium-Catalyzed Functionalization of Pyrroles and Indoles with Propargyl Alcohols
作者:Nora Thies、Cristian G. Hrib、Edgar Haak
DOI:10.1002/chem.201200188
日期:2012.5.14
Several ruthenium‐catalyzed atom‐economic transformations of propargylalcohols with pyrroles or indoles leading to alkylated, propargylated, or annulated heteroaromatics are reported. The mechanistically distinct reactions are catalyzed by a single ruthenium(0) complex containing a redox‐coupled dienone ligand. The mode of activation regarding the propargylalcohols determines the reaction pathway
Microwave-Assisted Addition of Pyrroles to Electron-Deficient Olefins: A Rapid Entry to<i>C</i>-Alkyl Pyrroles
作者:Zhuang-Ping Zhan、Wen-Zhen Yang、Rui-Feng Yang
DOI:10.1055/s-2005-872688
日期:——
A general procedure for the Michaeladdition of pyrroles with electron-deficientolefins using silica gel supported reagent under microwave irradiation, has been developed. This new method is fast, efficient, environmentally benign and solvent-free. A catalytic amount of BiCl 3 is employed for moderately bulk electron-deficientolefins.
Pyrroles undergo conjugate addition with electron deficient olefins in the presence of a catalytic amount of indium trichloride at ambient temperature to afford the corresponding Michael adducts in excellent yields with high selectivity without polymerisation. (C) 2001 Elsevier Science Ltd. All rights reserved.