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4-Hydroxycoumarin/2-hydroxychromone tautomerism: Infrared spectra of 3-substituted-2-13c-4-hydroxycoumarins

✍ Scribed by William R. Porter; William F. Trager

Book ID
112126726
Publisher
Journal of Heterocyclic Chemistry
Year
1982
Tongue
English
Weight
414 KB
Volume
19
Category
Article
ISSN
0022-152X

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## Abstract The novel [^14^C]‐labelled 3‐carbamoyl‐4‐hydroxycoumarins were prepared in two steps from 4‐chloro‐acetylsalicyloyl chloride (3). The isotope was incorporated by the reaction of diethyl malonate‐1,3‐^14^C with 4‐chloro‐acetylsalicyloyl chloride (3). Subsequent condensation of the result