期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 3, 期 9, 页码 2350-2358出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.5b00826
关键词
Coumarin-3-carboxylic acids; Potassium carbonate; Sodium azide; Water; Room-temperature; No column chromatography; Green chemistry
资金
- Department of Science & Technology (DST), New Delhi [EMR/2014/001220]
A simple, facile, and convenient practical method for the room temperature one-pot synthesis of a series of potentially biologically active coumarin-3-carboxylic acids has been developed in water from the Knoevenagel condensation and intramolecular cyclization of diverse 2-hydroxybenzaldehydes with Meldrum's acid using either potassium carbonate or sodium azide as a commercially available, cheap, and eco-friendly catalyst. The salient features of the present protocol are mild reaction conditions, good to excellent yields, high atom-economy, environmentally benignity, easy isolation of products, without column chromatography, clean reaction profiles, and applicability toward large-scale synthesis.
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