有機合成化学協会誌
Online ISSN : 1883-6526
Print ISSN : 0037-9980
ISSN-L : 0037-9980
グアニル-O-メチルイソ尿素塩製造法の改良
グアニル-O-アルキルイソ尿素(第4報)
長坂 英樹市川 英一大戸 敬二郎
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1966 年 24 巻 7 号 p. 588-591

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An improved method was proposed for the preparation of guanyl-o-methylisourea salts based on the addition reaction between dicyandiamide and methanol. Zinc salts have been found to serve as effective catalysts and furthermore, they convert the isourea formed into insoluble zinc complex salts. Guanyl-o-methylisourea zinc complex was given in a good yield, especially when zinc nitrate or zinc sulfate was used as a catalyst. Since the complex is readily decomposed into guanyl-o-methylisourea and zinc hydroxide upon treatment with hot water, the process is useful for the production of the isourea on a large scale. Some properties of those comoupnds were also discussed.

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