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4-Ethoxymethylene-2-phenyl-5(4H)-oxazolene as a Synthon for the synthesis of Some 2H-Pyran-2-ones
Heterocycles1992Vol. 33(2), pp. 843–843
Citations Over TimeTop 25% of 1992 papers
Abstract
Treatment of 4-ethoxymethylene-2-phenyl-5(4H)-oxazolone with activated methylene compounds under acidic or basic conditions leads to 2H-pyran-2-ones and fused pyran-2-ones. On the other hand, methyl (3-benzoylamino-5-methoxycarbonyl-2-oxo-2H-pyran-6-yl)-acetate (4) has also been prepared by a one-pot synthesis from dimethyl 1,3-acetonedicarboxylate, diethoxymethyl acetate, hippuric acid and acetic anhydride
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