METHODS:N (2,2 dimethoxylethyl)guanidine sulfate from aminoacetaldehyde dimethyl acetal was treated with concentrated HCl to get 2 aminoimidazole sulfate.

• 方法:以氨基乙醛缩甲醇制备的N(2,2二甲氧基乙基)胍硫酸盐经盐酸催化环合制得2氨基咪唑硫酸盐。