Year: 2024
Type: article
Abstract: A simple protocol for the preparation of O-acylated enol form (R/S)-ethyl-2-acetoxy-4-phenyl-4H-chromene-3-carboxylate 5 was presented. The compound was characterized by 1H-, 13C-and DEPT135 NMR spectra, including {1H,1H} COSY, {1H,13C} HSQC, {1H,13C} HMBC, and 2D-NOESY spectra. The preferred regioselectivity for O-acylation of 3,4-dihydrocoumarin 5 in the presence of substituent in the 4th position in the chroman ring and accounting for the steric hindrance of the ester group in the 3rd place was confirmed.
Source: Molbank
DOI: 10.3390/m1875
Institution: Sofia University "St. Kliment Ohridski"
Language: English
Subfield: Pharmacology
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $568
OpenAlex ID: W4401888190