An efficient synthesis of alpha-(alkylidene)-5, 5-dimethyl-delta-lactones

Parsekar, S.B.; Amonkar, C.P.; Nadkarni, V.S.; Tilve, S.G.

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An efficient synthesis of alpha-(alkylidene)-5, 5-dimethyl-delta-lactones

Parsekar, S.B.; Amonkar, C.P.; Nadkarni, V.S.; Tilve, S.G.

Source : Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry. 48(9); 2009; 1333-1336.

URI: http://irgu.unigoa.ac.in/drs/handle/unigoa/2267

Date: 2009

Document Type: Journal article

Abstract:

2-(-Alkylidene substituted)-5,5-dimethyl-delta-lactones have been synthesized in two steps. The stable phosphorane carboethoxy-methyledene (alpha-prenyl)-triphenylphosphorane is condensed with different carbonyl compounds to afford alpha,beta-unsaturated esters which are cyclised using PPA to give title compounds.

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