Intramolecular Pd-catalyzed C–H functionalization: construction of fused tetracyclic bis-indole alkaloid analogues
摘要:
An efficient Pd-catalyzed intramolecular indole-C2-arylation protocol for the synthesis of pharmaceutically active bis-indole alkaloid analogues from simple and readily available and 3,3'-Bis(1H-indo1-3-y1) methanes derivatives has been developed. The corresponding products could be obtained in moderate to excellent yields, which permits selective modification on either one of the two indole moieties independently. (C) 2013 Elsevier Ltd. All rights reserved.
One-pot Tandem Reactions for Direct Conversion of Thiols and Disulfides to Sulfonic Esters, Alcohols to Bis(indolyl)methanes and Synthesis of Pyrroles Catalyzed by N-Chloro Reagents
convenient synthesis of sulfonic esters from thiols and disulfides has been described. In situ preparation of sulfonyl chlorides from thiols is accomplished by oxidation with Chloramin-T, tetra-butylammonium chloride (t-Bu4NCl) and water. The sulfonyl chlorides are then further allowed to react with phenol derivatives in the same reaction vessel. Also, a facile synthesis of bis(indolyl)methanes from alcohols
A mild, simple and convenient procedure for the synthesis of bis(indolyl)methane derivatives was described using N-sulfonic acid poly(4-vinylpyridinium) chloride as an efficient, cheap, and reusable catalyst under mild conditions.
First Aminocatalytic Synthesis of Bis(indolyl)methanes and DFT Studies on the Reaction Pathway
作者:Grace Basumatary、Rahul Mohanta、Satyajit Dey Baruah、Ramesh Ch. Deka、Ghanashyam Bez
DOI:10.1007/s10562-019-02932-2
日期:2020.1
Abstract Carbon–carbonbond-formation by aminocatalytic nucleophilic addition to aryl aldehyde ideally generates addition–elimination product. Here, we report an unexpected, yet efficient aminocatalytic nucleophilic addition of indole to aryl aldehydes to synthesize pharmacologically important bis(indolyl)methanes via aminocatalytic addition substitution reaction. Although many acid catalysed synthesis
RuCl3·3H2O Catalyzed Reactions: Facile Synthesis of Bis(indolyl)methanes under Mild Conditions
作者:Hong-En Qu、Chen Xiao、Ning Wang、Kai-Hui Yu、Qiao-Sheng Hu、Liang-Xian Liu
DOI:10.3390/molecules16053855
日期:——
RuCl3·3H2O was found to be an effective catalyst for reactions of indoles, 2-methylthiophene, and 2-methylfuran with aldehydes to afford the corresponding bis(indolyl)methanes, bis(thienyl)methanes, and bis(fur-2-yl)methanes in moderate to excellent yields. Experimental results indicated that mono(indolyl)methanol is not the reaction intermediate under these reaction conditions.
BiCl3-loaded montmorillonite K10: a new solid acid catalyst for solvent-free synthesis of bis(indolyl)methanes
作者:K. Ravi、B. Krishnakumar、M. Swaminathan
DOI:10.1007/s11164-014-1636-3
日期:2015.8
Abstract We report an efficient green process for synthesis of bis(indolyl)methane derivatives under solvent-free conditions by use of a newsolid acid catalyst, BiCl3-loaded montmorilloniteK10. The catalyst was characterized by SEM, BET surface area measurement, and determination of its surface acidity by temperature-programmed desorption measurements. The salient features of the procedure are its