Click Chemistry Approach for Bis-Chromenyl Triazole Hybrids and Their Antitubercular Activity
摘要:
1,4‐Disubstituted bis‐chromenyl triazole hybrids 5a–m have been synthesized in a three‐step reaction sequence from 4‐(bromomethyl)‐2H‐chromen‐2‐ones 3a–m. The intermediate azides 4a–m underwent a regioselective 1,3‐dipolar cycloaddition with a 2H‐chromen‐2‐one linked acetylenic dipolarophile in the presence of Cu (II)/ascorbate/water/n‐butanol reaction medium. Three compounds 5h–j exhibited 6.25 μg/mL MIC against M. tuberculosis. Among the compounds screened for antifungal activity, lowest MIC of 6.25 μg/mL was observed for 5c against A. niger that also exhibited DNA cleavage observed by agarose gel electrophoresis. All the compounds were moderately active against both Gram‐positive and Gram‐negative bacterial strains. The cytotoxic effect of potent compounds on normal cells (V79 and HBL100) was assessed by MTT assay.
Process and composition for inhibiting the polymerization of cyclopentadiene compounds
申请人:Rinker Stefanie
公开号:US10138183B2
公开(公告)日:2018-11-27
A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I),
Compositions (AB) comprising (A) and (B) are also provided.
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