Tetrahedron

Nouveau mode de cyclisation de céto-ylures. Applicationa une synthèse originale d'acyl-3 hydroxy-4-coumarines et de l'hydroxy-11 benzo-(b) 12 [h] xanthone-12

P Babin, J Dunogues, M Petraud

文献索引：Babin, P.; Dunogues, J.; Petraud, M. Tetrahedron, 1981 , vol. 37, p. 1131 - 1139

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被引用次数: 27

摘要

The thermal decomposition of keto-ylides resulting from the reaction of m-and p-acetoxy benzoyl chlorides with Ph3P= CH-COOMe leads, after saponification to m-and p- phenylpropiolic acid respectively. Ortho substitution by an acyl group generally changes the orientation of the reaction Thus o.-acetoxy-. benzoyloxy-or phenylacetoxy benzoyl chlorides respectively afford: andin satisfactory yields. Saponification of the first and second ones ...