ZrCl<sub>4</sub>-Mediated Regio- and Chemoselective Friedel–Crafts Acylation of Indole
作者:Sankar K. Guchhait、Maneesh Kashyap、Harshad Kamble
DOI:10.1021/jo200561f
日期:2011.6.3
method for regio- and chemoselective Friedel–Crafts acylation of indole using acyl chlorides in the presence of ZrCl4 has been discovered. It minimizes/eliminates common competing reactions that occur due to high and multiatom-nucleophilic character of indole. In this method, a wide range of aroyl, heteroaroyl alkenoyl, and alkanoyl chlorides undergo smooth acylation with various indoles without NH
Catalyst-Free Intramolecular Formal Carbon Insertion into σ-CC Bonds: A New Approach toward Phenanthrols and Naphthols
作者:Ying Xia、Peiyuan Qu、Zhenxing Liu、Rui Ge、Qing Xiao、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201209269
日期:2013.2.25
of carbonyl groups in keto aldehyde substrates has been exploited for the synthesis of phenanthrols, naphthols, and their heteroatom‐containing analogues. Key to this highly efficient and robust methodology is the catalyst‐free intramolecularformal diazo carboninsertion of N‐tosylhydrazones into keto CCbonds (see scheme).
Scaffold hybridization in generation of indenoindolones as anticancer agents that induce apoptosis with cell cycle arrest at G2/M phase
作者:Maneesh Kashyap、Dipon Das、Ranjan Preet、Purusottam Mohapatra、Shakti Ranjan Satapathy、Sumit Siddharth、Chanakya N. Kundu、Sankar K. Guchhait
DOI:10.1016/j.bmcl.2012.02.007
日期:2012.4
Scaffold hybridization of several natural and synthetic anticancer leads led to the consideration of indenoindolones as potential novel anticancer agents. A series of these compounds were prepared by a diversity-feasible synthetic method. They were found to possess anticancer activities with higher potency compared to etoposide and 5-fluorouracil in kidney cancer cells (HEK 293) and low toxicity to corresponding normal cells (Vero). They exerted apoptotic effect with blocking of cell cycle at G2/M phase. (C) 2012 Elsevier Ltd. All rights reserved.