Synthesis of 5-arylidene-2, 2-dimethyl-1, 3-dioxane-4, 6-diones and coumarin-3-carboxylic acids via reaction of nitrones and Meldrum's acid

D Kumar, Suresh, JS Sandhu

文献索引：Kumar, Dhruva; Suresh; Sandhu, Jagir S. Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2013 , vol. 52, # 8 p. 1157 - 1160

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摘要

Abstract: A variety of nitrones have been synthesized and reacted with Meldrum's acid without the aid of any catalysts. Selectively, 5-arylidene-2, 2-dimethyl-1, 3-dioxane-4, 6- diones have been obtained with excellent yields under environmentally benign reaction conditions. Whereas, nitrone of salisylaldehydes with Meldrum's acid afford cyclized products ie coumarin-3-carboxylic acids.