Abstract:A series of 1,6-disubstituted 2,5-dibromohexan-1,3,4,6-tetraones and 2,2,5,5-tetrahalogenohexan-1,3,4,6tetraones have been obtained by the treatment of 1,6-disubstituted hexane-1,3,4,6-tetraones with bromine and chlorine. Bromination of (4Z)-6-aryl-3,4-dihydroxy-6-oxohexa-2,4-dienamides led to (2Z,4E)-2-aminocarbonyl-6-aryl-5-bromo-3,4-dihydroxy-6-oxohexa-2,4-dienoates and 6-aryl-2,5-dibromo-3,4,6-trioxohexanamides in preparative yield. The proposed structures of the reaction products were confirmed by IR, UV,… Show more
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