Chlorotrimethylsilane: A Powerful Lewis Acidic Catalyst in Michael‐Type Friedel–Crafts Reactions of Indoles and Enones
作者:Li‐Wen Xu、Wei Zhou、Lei Yang、Chun‐Gu Xia
DOI:10.1080/00397910701544737
日期:2007.9.1
silicon Lewisacidcatalyst in catalyzing the Michael‐type Friedel–Craftsreactions of indoles and chalcones to afford corresponding 3‐substituted indole derivatives in good to excellent yields. The method is metal‐free, has mild reaction conditions, and generates good yields of products with greater selectivity, which make it a useful and attractive process for the synthesis of different indole derivatives
Palladium-Catalyzed Michael Addition of Indoles to α,β-Unsaturated Ketones in an Ionic Liquid
作者:Yan-Guang Wang、Wei-Jun Li、Xu-Feng Lin、Jun Wang、Guo-Liang Li
DOI:10.1055/s-2005-871952
日期:——
The PdCl 2 (CH 3 CN) 2 -catalyzed Michaeladdition reaction of indoles with α,β-unsaturated ketones in ionicliquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF 4 ]) to afford the corresponding 3-alkylated indolesin good yields is described. The catalyst system PdCl 4 (CH 3 CN) 2 /[bmim][BF 4 ] can be recovered and reused.
A simple, mild, rapid, and highly efficient method for the conjugateaddition of 1H-indoles to electron-deficientolefins has been developed using NaHSO4 ⋅ SiO2 as heterogeneous catalyst. The conversion proceeds at room temperature, and the corresponding Michael adducts are formed in good-to-excellent yields.
Kan war, Deepika; Rani, Rashmi; Agarwal, Jyoti, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2010, vol. 49, # 9, p. 1290 - 1299
作者:Kan war, Deepika、Rani, Rashmi、Agarwal, Jyoti、Peddinti, Rama Krishna