Studies of Cyanamide Derivatives. Part 109. A Convenient Method for Preparation of 4-Aminothiazole Compounds from Alkoxythiocarbonylcyanamide Salts
作者:Toshio Fuchigami、Mou-Yung Yeh、Tsutomu Nonaka、Hsien-Ju Tient
DOI:10.1246/bcsj.56.3851
日期:1983.12
α-Halo derivatives of ketones, ester, and nitrile reacted readily with potassium ethoxythiocarbonylcyanamide to provide the corresponding 4-amino-2-ethoxythiazole compounds in good yields, while α-halo amide did not. In a similar manner, α,α′-dihalo ketone reacted with 2 equiv of alkoxythiocarbonylcyanamide and S-methyl N-cyanocarbamodithioate salts to give the corresponding bis(4-amino-5-thiazolyl)
酮、酯和腈的 α-卤代衍生物很容易与乙氧基硫代羰基氰氨化钾反应,以良好的收率提供相应的 4-氨基-2-乙氧基噻唑化合物,而 α-卤代酰胺则不然。以类似的方式,α,α'-二卤代酮与 2 当量的烷氧基硫代羰基氰胺和 S-甲基 N-氰基氨基二硫代盐反应,得到相应的双(4-氨基-5-噻唑基)酮。