2002oxocarboxylic acids and esters oxocarboxylic acids and esters (benzene compounds) Q 0460
-0874-Aryl-2,4-dioxobutanoic Acids and Their Derivatives in Reactions with Diazoalkanes.-Reaction of the title dioxobutanoic acids (I) and amides (VI) with diazoalkanes provides, depending on the educt ratio, the corresponding esters (III), the methoxy derivatives (IV) and (VIII) or pyrazole derivatives (V) and (IX). -(ZALESOV, V. V.; KATAEV, S. S.; PULINA, N. A.; KOVYLYAEVA, N. V.; Russ. J. Org. Chem. 38 (2002) 6, 840-844; Perm' State Univ., Perm' 614600, Russia; EN)