申请人:Riker Laboratories, Inc.
公开号:US03984548A1
公开(公告)日:1976-10-05
Anti-microbial agents which are 2,3-dihydro-3-substituted-7-oxo-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxy lic acids are prepared by condensation of benzoxazines with ethoxymethylene malonate esters followed by ring closure with poly phosphoric acid and hydrolysis of the resulting esters.
制备2,3-二氢-3-取代-7-氧代吡啶[1,2,3-de]-1,4-苯并噁嗪-6-羧酸抗微生物剂的方法是将苯并噁嗪与乙氧基甲烯基丙二酸酯缩合,然后用聚磷酸进行环合反应,并水解所得酯。