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Synthesis of a new carbazole cyclic dimer via Knoevenagel condensation

✍ Scribed by Yadong Zhang; Tatsuo Wada; Hiroyuki Sasabe

Publisher
Elsevier Science
Year
1996
Tongue
French
Weight
167 KB
Volume
37
Category
Article
ISSN
0040-4039

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πŸ“œ SIMILAR VOLUMES

A convenient synthesis of coumarin-3-car
A convenient synthesis of coumarin-3-carboxylic acids via Knoevenagel condensation of Meldrum's acid with ortho-hydroxyaryl aldehydes or ketones
✍ Aimin Song; Xiaobing Wang; Kit S Lam πŸ“‚ Article πŸ“… 2003 πŸ› Elsevier Science 🌐 French βš– 119 KB

Coumarin-3-carboxylic acids were obtained in high yields with excellent purity from ortho-hydroxybenzaldehydes and Meldrum's acid after a 2 h reflux in ethanol. The less reactive ketones were first reacted with alcoholic ammonia to form ketimines, which were then condensed with Meldrum's acid to gen