SCHEDULED MAINTENANCE:
2,3-Disubstituted chromones have been synthesised by the cyclisation under basic conditions of the enol esters of o-acyloxyphenyl alkyl ketones. A mechanism involving an intramolecular electrophilic addition between the enol double bond and the o-acyl group is suggested. Phenyl and enol esters, and chromones have been prepared.
T. Széll, J. Chem. Soc. C, 1967, 2041 DOI: 10.1039/J39670002041
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