申请人:Lonza Ltd.
公开号:US04224446A1
公开(公告)日:1980-09-23
Process for the production of methotrexate, which is N[p-([(2,4-diamino-6-pteridyl)-methyl]-N.sup.10 -methylamino)-benzoyl]-L-glutamic acid. The process includes converting 1,1-dichloroacetone with 2,4,5,6-tetraaminopyrimidine in the presence of sodium bisulfite at a constant pH between 3.5 and 5 and at a temperature between 10.degree. and 100.degree. C. The resultant 2,4-diamino-6-methylpteridine is converted in a reaction medium with bromide. 0.3 to 1.0 ml of bromine is used per 1.0 g of the 2,4-diamino-6-methylpteridine. The 2,4-diamino-6-bromo methyl pteridine is converted with p-(N-methyl)-aminobenzoyl-L-glutamic acid or a salt thereof in a polar reaction medium into methoxtrexate.
制备甲氨蝶呤的方法包括将1,1-二氯丙酮与2,4,5,6-四氨基嘧啶在亚硫酸氢钠存在下,在pH值在3.5至5之间、温度在10℃至100℃之间的恒定条件下转化。得到的2,4-二氨基-6-甲基喋啉与溴化物在反应介质中反应。每1.0克2,4-二氨基-6-甲基喋啉使用0.3至1.0毫升溴。2,4-二氨基-6-溴甲基喋啉与p-(N-甲基)-氨基苯甲酰-L-谷氨酸或其盐在极性反应介质中反应,制得甲氨蝶呤。