申请人:Pfizer Inc.
公开号:US04031077A1
公开(公告)日:1977-06-21
The present invention discloses novel 6-acylamino-2,2-dimethyl-3-phosphonopenams and certain lower alkyl esters thereof possessing antibacterial activity, methods for their production, and intermediates therefor; the production comprises the steps of reacting 6-triphenylmethylamino-2,2-dimethylpenam-3-carboxylic acid with lead tetraacetate to form the corresponding 3-acetoxy compound, the latter is converted to .alpha.-triphenylmethylamino-5,5-dimethyl-3-thiazoline-2-acetic acid which is condensed with dimethyl phosphite to produce .alpha.-triphenylmethylamino-5,5-dimethyl-4(0,0-dimethylphosphono)-thiazol idine-2-acetic acid which is cyclized to 6-triphenylmethylamino-2,2-dimethyl-3-(0,0-dimethylphosphono)penam and the latter is subsequently deblocked and acylated.
本发明公开了具有抗菌活性的新型6-酰胺基-2,2-二甲基-3-磷酸佩纳姆和其某些低烷基酯,以及它们的生产方法和中间体;生产包括以下步骤:将6-三苯甲基氨基-2,2-二甲基佩纳姆-3-羧酸与醋酸铅反应,形成相应的3-乙酰氧化合物,后者转化为α-三苯甲基氨基-5,5-二甲基-3-噻唑啉-2-乙酸,与二甲基磷酸酯缩合,产生α-三苯甲基氨基-5,5-二甲基-4(0,0-二甲基磷酸酯)-噻唑啉-2-乙酸,环化为6-三苯甲基氨基-2,2-二甲基-3-(0,0-二甲基磷酸酯)佩纳姆,后者随后去保护基和酰化。