In order to synthesize the intermediates of cannabimimetics, the benzoylation of indoles with 2'/3'/4'-substituted benzoyl chloride in the presence of Et2AlCl was examined. Among the products, we found that the H-1 NMR spectra of 3-(2'-substituted)-benzoyl-2-methylindoles had interesting features. We investigated their physicochemical properties based on VT-NMR, and it was revealed that conformer A (s-trans) is present in preference to conformer B in these compounds.
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.
Friedel-Crafts 3-(2-Bromobenzoylation) of Indoles and Intramolecular Direct Arylation: An Efficient Route to Indenoindolones
作者:Sankar Guchhait、Maneesh Kashyap
DOI:10.1055/s-0031-1289663
日期:2012.2
Friedel-Crafts reaction of 2-bromobenzoyl chlorides with indoles to give 3-(2-bromobenzoyl)indoles and their palladium-catalyzed intramolecular direct arylation to give indenoindolones, has been developed. 3-(2-Bromobenzoyl)indoles were crucial intermediates; the method was successful with N-unprotected or N-protected indoles. This approach affords a convenient preparation of diverse substituted and functionalized
A cascade reaction of indolyl-migratory isocyanide insertion, scaffold rearrangement and redox-neutral event with isocyanide as a C<sub>(sp<sup>3</sup>)</sub>H–N synthon efficiently constructs indolylisoindolinones
作者:Shailendra Sisodiya、Ayan Acharya、Mithilesh Nagpure、Nibedita Roy、Santosh K. Giri、Hare Ram Yadav、Angshuman R. Choudhury、Sankar K. Guchhait
DOI:10.1039/d2cc04273h
日期:——
Herein, we report a Pd(0)-catalyzed cascade reaction of intramolecular indolyl isocyanide-insertion, isocyanide-initiated scaffold-rearrangement with indolyl migration and redox-neutral process, which affords an efficient access to indolylisoindolinones. Isocyanide as a C(sp3)H–N synthon and the alkyl motif of isocyanide as a hydride source have been explored for the first time.
在这里,我们报告了分子内吲哚基异氰化物插入、异氰化物引发的支架重排与吲哚基迁移和氧化还原中性过程的 Pd(0) 催化的级联反应,这为获得吲哚基异吲哚啉酮提供了有效途径。首次探索了作为 C (sp 3 ) H-N 合成子的异氰化物和作为氢化物来源的异氰化物的烷基基序。