In situ generation of Iron(<scp>iii</scp>) dodecyl sulfate as Lewis acid-surfactant catalyst for synthesis of bis-indolyl, tris-indolyl, Di(bis-indolyl), Tri(bis-indolyl), tetra(bis-indolyl)methanes and 3-alkylated indole compounds in water
Iron(III) dodecyl sulfate as Lewis acid-surfactant catalyst was prepared in situ and effectively used in the synthesis of bis(indolyl)methanes and Michael reactions of indoles with α,β-unsaturated carbonyl compounds in water. Also, this method was used for the synthesis of 1,1,3-tri-indolyl compounds, producing good to excellent yield at room temperature.
A high‐yielding, copper‐catalyzed dearomatization reaction of indole from 2‐methylindole‐derived oxime acetates was realized, providing access to structurally novel spiro[indoline‐3,2′‐pyrrolidine] derivatives in 67–98% yields. When the C‐2 position of the indole was not substituted, azacarbazole derivatives were obtained in moderate yields. This transformation provides an efficient approach to access
An effective one-pot synthesis of β-indolylketones from saturated ketones and indoles was developed. It is noteworthy that this methodology has a good functional group tolerance (alkyl, nitro, halogen, hydroxyl, methoxyl, carboxyl and ester) and is of great significance to the preparation of many indole heterocycles.
InCl3-Catalysed Conjugate Addition of Indoles with Electron-Deficient Olefins
作者:J. S. Yadav、Sunny Abraham、B. V. S. Reddy、G. Sabitha
DOI:10.1055/s-2001-18068
日期:——
Indole and 2-methylindole undergo conjugate addition with electron-deficient olefins in the presence of a catalytic amount of InCl3 at ambient temperature to afford the corresponding Michael adducts in excellent yields with high selectivity.
Conjugate Addition of Indoles with Electron‐Deficient Olefins Catalyzed by Fe‐Exchanged Montmorillonite K10
作者:Pankajkumar R. Singh、Shriniwas D. Samant、Devendrapratap U. Singh
DOI:10.1080/00397910500516357
日期:2006.5
Abstract Conjugate addition of indoles with a variety of electron‐deficientolefins in the presence of Fe‐exchanged montmorillonite K10 affords the corresponding Michael adduct in excellent yields with high selectivity. The catalyst was also found to be recyclable.
摘要 在 Fe 交换的蒙脱石 K10 存在下,吲哚与各种缺电子烯烃的共轭加成以高产率和高选择性得到相应的迈克尔加合物。还发现该催化剂是可回收的。