Preparation of 5-Substituted
2-(2-Alkyl/aryl-1<i>H</i>-imidazol-4-yl)oxazoles
and 5-Substituted 2-(2-Alkyl/arylthiazol-4-yl)oxazoles
by Utilizing 5-Substituted 2-(2-Bromo-1,1-diethoxyethyl)oxazole
as a Synthon
作者:Denis Laurent、Jeffrey Romine
DOI:10.1055/s-0028-1088162
日期:——
oxazolylimidazoles, -thiazoles, and -oxazoles is gained from a masked α-halo ketone attached to the 2-position of the oxazole ring. 3-Bromo-2,2-diethoxy-N-(2-oxoalkyl)propionamides readily cyclize to generate the key 5-substituted 2-(2-bromo-1,1-diethoxyethyl)oxazole intermediate. 3-bromo-2,2-diethoxypropionic acid - α-halo ketones - cyclizations - heterocycles - oxazoles
合成恶唑基取代的杂环(包括恶唑基咪唑,-噻唑和-恶唑)的方法是从附在恶唑环2位上的掩蔽α-卤代酮获得。3-溴-2,2-二乙氧基-N-(2-氧代烷基)丙酰胺容易环化以生成关键的5-取代的2-(2-溴-1,1-二乙氧基乙基)恶唑中间体。 3-溴-2,2-二乙氧基丙酸-α-卤代酮-环化-杂环-恶唑