Synthetic Communications

Condensation Op 3-Acetyl-and 3-Acetyl-4-Methyl-2H-1-Benzopyran-2-One with Aromatic Adehydes

E Dimitrova, Y Anghelova

文献索引：Dimitrova, E.; Anghelova, Y. Synthetic Communications, 1986 , vol. 16, # 10 p. 1195 - 1205

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被引用次数: 14

摘要

Abstract The reactivities of 3-acetyl-2H-1-benzo-pyran-2-one (2) and 3-acetyl-4-methyl-2H-1- benzopy-ran-2-one (3) are compared in the condensation with aromatic aldehydes. It is established that the benzopyrones 2 and 4 condense with various aromatic aldehydes in chloroform containing some drops of piperidine by boiling for 7 hours and azeotropic distillation of water, yielding 3-cinnamoyl-2H-1-benzopyran-2-ones (3a-g) and 4-(2- ...