Journal
RUSSIAN JOURNAL OF ORGANIC CHEMISTRY
Volume 44, Issue 11, Pages 1649-1651Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1070428008110158
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The condensation at room temperature in the trifluoroacetic acid of para- and meta-hydroxy-substituted methylphenylcarbamate with cinnamic acids or their esters containing electron-donor substituents in the benzene ring yielded dihydrocoumarins with a carbamate function attached to C(6) or C(7). Under similar conditions the methyl(2-hydroxyphenyl)carbamate, cinnamic acids or their esters containing electron-acceptor substituents or electron-donor substituents in the ortho-position of the benzene ring are not involved into the condensation.
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