Convenient and simple synthesis of 2-aminothiazoles by the reaction of α-halo ketone carbonyls with ammonium thiocyanate in the presence of N-methylimidazole
作者:H.M. Meshram、Pramod B. Thakur、B. Madhu Babu、Vikas M. Bangade
DOI:10.1016/j.tetlet.2012.07.080
日期:2012.9
Substituted 2-aminothiazole derivatives were obtained as a result of N-methylimidazole catalyzed cyclization of α-halo ketone carbonyls with ammonium thiocyanate in water–alcoholic media. The generality of the method has been demonstrated by screening a series of aromatic/heteroaromatic/aliphatic α-halo ketones, α-halo β-diketones, and α-halo β-ketoesters. The developed method is simple, mild, and
在水-醇介质中,N-甲基咪唑与硫氰酸铵的N-甲基咪唑催化的α-卤代酮羰基环化反应获得了取代的2-氨基噻唑衍生物。通过筛选一系列芳族/杂芳族/脂肪族α-卤代酮,α-卤代β-二酮和α-卤代β-酮酸酯,证明了该方法的普遍性。所开发的方法简单,温和,通用,可从容易获得的起始原料中以良好至中等的收率制备功能多样的2-氨基噻唑。