Substituierte 2-Alkoxy-5-amino- und-2,5-diamino-imidazole aus Oxazol-2-yliden-cyanamiden
作者:K. Gewald、J. Angermann、H. Sch�fer
DOI:10.1007/bf00813797
日期:1996.3
N-Cyano-S-methyl-isothio-ureases (1) react with alpha-halogen ketones (2) by ring closure yielding the (3H-oxazol-2-yliden)-cyanamides 3. by ring transformation, 2-Alkoxy-5-amino-1-phenyl-3H-imidazol-4-yl)-ketones (4) are formed. Primary and secondary amines react with 3 to give 2-N-alkylated (2,5-Diamino-1-phenyl-3H-imidazol-4-yl)-ketones.