Eco-friendly polyethylene glycol promoted Michael addition reactions of α,β-unsaturated carbonyl compounds
作者:Dalip Kumar、Gautam Patel、Braja G. Mishra、Rajender S. Varma
DOI:10.1016/j.tetlet.2008.09.116
日期:2008.12
Intra- and inter-nucleophilic addition reactions of different α,β-unsaturatedcarbonylcompounds were found to be highly effective without any additives in PEG-400 as a recyclable reaction medium under neutral conditions.
16–18 with 4-ethyl, 4-carboxy-, 4-benzyloxy- and 4-benzyloxy-3-methoxy groups were novel, not previously described in the scientific literature. To determine the biological properties of the synthesized compounds, anticancer and antimicrobial activity assays were performed. Antiproliferative potential was evaluated on four different human colon cancer cell lines—HT-29, LS180, LoVo and LoVo/DX —using
Ionic liquid catalyzed expeditious synthesis of 2-aryl-2,3-dihydroquinolin-4(1<i>H</i>)-ones and 2-aryl-2,3-dihydro-4<i>H</i>-chromen-4-ones under microwave irradiation
作者:Dalip Kumar、Gautam Patel、Anil Kumar、Ram K. Roy
DOI:10.1002/jhet.123
日期:2009.7
A facile and convenient synthesis of 2-aryl-2,3-dihydroquinolin-4(1H)-one and 2-aryl-2,3-dihydro-4H-chromen-4-one has been described using ionicliquidcatalyzed intramolecular cyclization of the corresponding 2′-aminochalcones and 2′-hydroxychalcones, respectively. The rapid and fairly general protocol affords product in good yield. Ionicliquid, 1-butyl-3-methylimidazolium tetrafluoroborate, was