6-Amino-1-(4-chloro-2-methylphenyl)-3-methylpyrimidine-2,4-dione 在
sodium hydrogensulfite 、
溶剂黄146 、 sodium nitrite 作用下,
以
ammonium hydroxide 为溶剂,
反应 1.0h,
生成 [3-(4-Chloro-2-methyl-phenyl)-1-methyl-2,6-dioxo-2,3,6,9-tetrahydro-1H-purin-8-yl]-carbamic acid ethyl ester