Synthesis of 1,3-diaryl-spiro[azetidine-2,3′-indoline]-2′,4-diones<i>via</i>the Staudinger reaction:<i>cis</i>- or<i>trans</i>-diastereoselectivity with different addition modes
A new synthetic approach for realizing biologically relevant bis-aryl spiro[azetidine-2,3′-indoline]-2′,4-diones was developed based on Staudinger ketene–imine cycloaddition through the one-pot reaction of substituted acetic acids and Schiff bases in the presence of oxalyl chloride and an organic base. A series of [azetidine-2,3′-indoline]-2′,4-diones were synthesized using this method. For comparison
Evaluation of N-(2-Thienylidene)amines, N-(2-Hydroxybenzylidene)amines and 3-Iminoindolin-2-ones as Antileishmanial Agents
作者:Yasser M.S.A. Al-Kahraman、Girija S. Singh、Masoom Yasinzai
DOI:10.2174/157018011795514221
日期:2011.6.1
The paper describes the synthesis and antileishmanial activity of N-substituted imines, obtained from the reactions of primary amines with three biologically important aldehydes/ketones, thiophene-2-carbaldehyde, 2- hydroxybenzaldehyde (salicylaldehyde) and indoline-2,3-dione. Of the fourteen compounds screened from three classes, five compounds showed significant antileishmanial activity. Among the three classes of imines, the class of N-(2- thienylidene)amines showed much better activity than the other two classes. N-(2-Thienylidene)benzhydrylamine showed IC50 value of 0.51 μg/ml. The effect of substituents on the bioactivity is discussed.