Journal of the American Chemical Society

2-Pyrones. XXVI. Alkylidene Methylglutaconic Acids and 3, 6-Dialkyl-5-carboxy-5, 6-dihydro-2-pyrones from Methyl β-Methylglutaconate and Ethyl Isodehydroacetate …

RH Wiley, HG Ellert

Index: Wiley; Ellert Journal of the American Chemical Society, 1957 , vol. 79, p. 2266,2270

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Citation Number: 10

Abstract

The condensation of aliphatic aldehydes with methyl P-methylglutaconate gives alkylidene glutaconic acids (111) and carboxy-&lactones (IV). Shortchain and branched-chain aldehydes give diacids (111); longer chain and unbranched aldehydes give carboxylactones (IV). Decarboxylation of these products gives the dienonoic acids VI and &lactones V. The lactones can be hydrolyzed to the corresponding acids and the preferred ...