Ruthenium-catalyzed direct C3 alkylation of indoles with α,β-unsaturated ketones
作者:Shuai-Shuai Li、Hui Lin、Xiao-Mei Zhang、Lin Dong
DOI:10.1039/c4ob02124j
日期:——
paper, a simple and highly efficient ruthenium-catalyzed direct C3 alkylation of indoles with various alpha,beta-unsaturated ketones without chelation assistance has been developed. This novel C-H activation methodology exhibits a broad substrate scope such as different substituted indoles, pyrroles, and other azoles. Further synthetic applications of the alkylation products can lead to more attractive
Iodine-catalyzed efficient conjugate addition of pyrroles to α,β-unsaturated ketones
作者:Biswanath Das、Nikhil Chowdhury、Kongara Damodar
DOI:10.1016/j.tetlet.2007.02.094
日期:2007.4
Iodine was used as a catalyst for the conjugateaddition of pyrroles to α,β-unsaturated ketones at room temperature. Mono- and dialkylated products were obtained by using equimolar amounts of the reactants. However, the use of excess enones afforded only dialkylated products.
Conjugate addition of pyrroles to α,β-unsaturated ketones using copper bromide as a catalyst
作者:Radhika S. Kusurkar、Sandip K. Nayak、Neelam L. Chavan
DOI:10.1016/j.tetlet.2006.08.030
日期:2006.10
Copper bromide was used as a catalyst for the addition of pyrroles to enones. When both the reactants were used in equimolar amounts, mono and dialkylated products were obtained. However, the use of excess enone furnished only dialkylated products. Thus, copper bromide was shown to be an efficient catalyst for the dialkylation of pyrroles.