Preparation of dialkali metal hexahydropyrimidine-1,...

Details Preparation of dialkali metal hexahydropyrimidine-1,... Preparation of dialkali metal hexahydropyrimidine-1,...

C - Chemistry, Metallurgy

07

D

260/251

C07D 239/04 (2006.01) C07D 487/22 (2006.01)

Patent

CA 1069122

PREPARATION OF DIALKALI METAL HEXAHYDROPYRIMIDINE-1,3-DIACETATE AND, DIALKALIMETAL 5-HYDROXYHEXAHYDROPYRIMIDINE-1,3-DIACETATE Abstract of the Disclosure Image or, Image (in which M is an alkali metal ion) is prepared by forming an alkaline aqueous solution of an alkali metal hydroxide and hexahydropyrimidine or 5-hydroxyhexahydropyrimidine and feeding an alkali metal cyanide and aqueous formaldehyde into the alkaline aqueous solution while agitating the resulting reacting mixture and while maintaining its temperature within a range effective for vaporizing by- product ammonia therefrom, the alkali metal cyanide and the formaldehyde being fed at rates effective for maintain- ing an excess of unreacted cyanide over unreacted formalde- hyde in the reacting mixture. The alkali metal cyanide can be replaced with HCN and an amount of the alkali metal hydrox- ide about stoichiometrically equivalent to the HCN.

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