7-[4-(imidazo[1,2-a]pyridin-5-ylthio)butyl]-1-oxo-9-phenyl-3,4-dihydro-2H,6H-pyrimido[6,1-b][1,3]thiazine-6,8(7H)-dione 、
盐酸 在
乙醚 作用下,
以
甲醇 为溶剂,
以to yield 132 mg (72.9%, light yellow foamy substance) of the desired product的产率得到7-[4-(imidazo[1,2-a]pyridin-5-ylthio)butyl]-1-oxo-9-phenyl-3,4-dihydro-2H,6H-pyrimido[6,1-b][1,3]thiazine-6,8(7H)-dione hydrochloride