6-Amino-5-butylamino-1,3-dimethyl-7-(4-methyl-piperazin-1-yl)-1H-pyrido[2,3-d]pyrimidine-2,4-dione 在
亚硝酸正戊酯 、
溶剂黄146 作用下,
反应 0.5h,
以97%的产率得到1-butyl-4-N-(1-methylpiperazinyl-4)-6,8-dimethyl-6,7,8,9-tetrahydrotriazolo(4',5':4,5)pyrido<2,3-d>pyrimidine-7,9-dione