Synthesis and Structural Elucidation of the Acetylation Reaction’s Product(s) of the 2(lH)-Quinoxalinones Derived from L-Ascorbic Acid. X-Ray Molecular Structure of 3-(N-acetyI-2-naphthylhydrazono)-2,3-dihydro-2-acetoxyfuro[2,3-blquinoxaline
نویسندگان
چکیده
Acetylation reaction's product(s) o f 3-[L-threo-2,3,4-trihydroxy-1-(2-naphthylhydrazono)butyl]quinoxalin-2(lH)-one (2b) were found to be dependent on the reaction condition. While the tri-O-acetyl (3b) was isolated in high yield from 2 b under the action o f acetic anhydride/ pyridine mixture, compounds 4 b and 5 b as well as trace o f 3b were obtained when 2 b was heated in acetic anhydride. On the other hand, 3-[l-(2-naphthylhydrazono)-glyoxall-yl]quinoxalin-2(lH)-one (7) underwent ring closure and afforded the condensed tricyclic compound 8 under the action o f acetic anhydride/pyridine mixture.
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