In this study, the synthesis of various geranyloxycoumarin derivatives from hydroxycoumarin was obtained in good yield under mild conditions using Cs2CO3. In the synthesis of geranyloxycoumarin derivatives, when 4-hydroxycoumarin reacts with geranyl bromide under mild conditions due to tautomeric keto-enol forms, 4-geranyoxycoumarin (3a), C-alkylated coumarin (3aa) and structure 3ab formed by hydrolysis and decarboxylation from 3aa were formed products. In addition, the alkylation reaction of 3-OH, 5-OH, 6-OH, 7-OH, and 8-OH coumarin except 4-OH group produced a high yield.
geranyloxycoumarin derivatives 4-hydroxycoumarin tautomeric keto-enol forms coumarin compounds geranyl bromide
Primary Language | English |
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Subjects | Organic Chemistry |
Journal Section | Articles |
Authors | |
Publication Date | February 28, 2022 |
Submission Date | September 18, 2021 |
Acceptance Date | November 23, 2021 |
Published in Issue | Year 2022 Volume: 9 Issue: 1 |