A process for the preparation of alkyl 2-carboxy-3,4-dialkoxybenzenecarbamates is described. The carbamates are useful intermediates in the preparation of 8-halo-5,6-dialkoxyquinazoline-2,4-diones. The diones are useful as cardiotonic agents.
描述了一种制备烷基2-羧基-3,4-二烷氧基苯甲酰胺的方法。这些甲酰胺是制备8-卤代-5,6-二烷氧基
喹唑啉-2,4-二酮的有用中间体。这些二酮作为心力补充剂是有用的。