Interrelationship between carboxyvinylketenes, methyleneketenes, vinylketenes, and hydroxyacetylenes

C Wentrup, P Lorencak

Index: Wentrup,C.; Lorencak,P. Journal of the American Chemical Society, 1988 , vol. 110, p. 1880

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Citation Number: 33

Abstract

Abstract: Carboxy (vinyl) ketenes, alkylideneketenes, and vinylketenes have been obtained selectively, sequentially, and isomerically pure for the first time by flash vacuum pyrolysis of 2, 2-dimethyl-5-alkylidene-l, 3-dioxane-4, 6-diones (Meldrum's acid derivatives) under controlled conditions. Each of the ketenes was directly observed by IR spectroscopy and trapped with methanol or aniline. Highly unstable compounds believed to be the ...