申请人:ORTHO PHARMACEUTICAL CORPORATION
                            
                            
                                公开号:EP0210857A1
                            
                            
                                公开(公告)日:1987-02-04
                            
                            
A process for the preparation of alkyl 2-carboalkoxy-3,4- dialkoxybenzenecarbamates is described. The carbamates are useful intermediates in the preparation of 8-hato-5,6dielkoxyquinazoline-2,4-diones. The diones are useful as cardiotonic agents.
                            描述了一种制备 2-羧基烷氧基-3,4-二烷氧基
苯甲酸烷基酯的工艺。这种
氨基甲酸酯是制备 8-哈托-5,6-二烷氧基
喹唑啉-2,4-二酮的有用中间体。该二酮可用作强心剂。