3-benzyl-5,6,7,8-tetrahydro-1H-pyrido[4,3-d]pyrimidine-2,4-dione hydrochloride 、
聚合甲醛 、
盐酸 在
i 、
Water isopropylalcohol 作用下,
以
甲酸 为溶剂,
反应 8.0h,
以3-benzyl-6-methyl-5,6,7,8-tetrahydro-1H-pyrido[4,3-d]pyrimidine-2,4-dione hydrochloride was obtained from the residue的产率得到3-Benzyl-6.-methyl-5,6,7,8-tetrahydro-1H-pyrido[4,3-d]-pyrimidine-2,4-dione hydrochloride