Quinoxalinecarboxylic Acids and Anhydrides

There is an extensive recent literature on quinoxalinecarboxylic acids and anhydrides, much of it in connection with their role as intermediates for derivatives such as carbohydrazides. [Pg.317]

This chapter covers not only nuclear and extranuclear quinoxalinecarboxylic acids (and anhydrides) but also the carboxylic esters, acyl halides, carboxamides, carbohydrazides, carbonitriles, carbaldehydes, and (ketonic) acyl derivatives of quinoxaline a few related speceis are also included. To avoid repetition, the interconversions of these quinoxaline derivatives are discussed only at the first opportunity thus the esterification of quinoxalinecarboxylic acids in covered as a reaction of carboxylic acids rather than as a preparative route to carboxylic esters, simply because the section on carboxylic acids precedes that on carboxylic esters. To minimize any confusion, appropriate cross-references have been inserted. [Pg.317]

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