Studies toward the syntheses of functionally substituted. gamma.-butyrolactones and spiro-. gamma.-butyrolactones and their reaction with strong acids: a novel route …
AK Mandal, DG Jawalkar
Index: Mandal, A.K.; Jawalkar, D.G. Journal of Organic Chemistry, 1989 , vol. 54, # 10 p. 2364 - 2369
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Citation Number: 27
Abstract
A general strategy for the conversion of 5-keto carboxylic acids, 6 (via their enol-lactones 7), to a variety of y-lactones, 8a-c, and spiro-y-lactones, 8d-g, is described. Lactones 8b and 8d, e may be further converted into the corresponding a-pyrones, 17b and 17d, e, respectively, in the presence of strong acids.
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