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2005
Carboxylic amides
Q 0490
Reactions of Polyfluorinated 2-Arylhydrazono-3-oxocarboxylic Acid Esters with
— Polyfluorinated 2-arylhydrazono-3-oxocarboxylic acid
08- 085 o-Phenylenediamine.
esters react with o-phenylenediamine in neutral medium to furnish the corresponding
o-aminoanilides as the major products. Prolonged heating in xylene converts these anilides into benzodiazepine derivatives such as (VII). Interestingly, benzimidazole formation (IV) is observed in reactions of 2-arylhydrazono-3-oxobutanoate derivatives (I)
with o-phenylenediamine. — (KHUDINA, O. G.; SHCHEGOL'KOV, E. V.;
BURGART, Y. V.; SALOUTIN, V. I.; Russ. J. Org. Chem. 40 (2004) 6, 813-817; Inst.
Org. Synth., Ural Div. Russ. Acad. Sci., Ekaterinburg 620219, Russia; Eng.) —
D. Singer
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