Biomimetic synthesis of some novel coumarin dimers
β Scribed by Mohammad Ilyas; Mehtab Parveen
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- French
- Weight
- 257 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0040-4020
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## Abstract Esculetin (1) and the novel compounds 5βchloroesculetin (5) and 5βbromoesculetin (6) were obtained from a lightβinduced cyclization of __trans__βcaffeic acid (3) catalyzed by [FeNa(edta)] and/or H~2~SO~4~, HCI, or HBr (__Scheme 1__). The experimental conditions for __trans__β__cis__βiso