Abstract
A number of 3-(2-benzofuryl)-6-ethylchromones and their 4-thioxo derivatives were synthesized, and the action of hydroxylamine and hydrazine on them was investigated. Isomeric 3 (5)-(o-hydroxyphenyl) isoxazoles were obtained in the reaction with hydroxylamine. The predominant formation of one or the other isomer depends on the character of the substituents in the 2 and 4 positions of the chromone. The reaction of chromones with hydrazine leads to o-hydroxyphenylpyrazoles. The compounds obtained were characterized by their IR, UV, and PME spectra.
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