作者:Tsuyoshi Shinozuka、Akira Nakao、Keiji Saito、Satoru Naito
DOI:10.1246/cl.2006.1090
日期:2006.10
efficient and practical method for the preparation of 4-nitrogen-substituted benzoic acids is described. Our method consists of the aromatic substitution of 2,2,2,4'-tetrafluoroacetophenone with amines, followed by haloform reaction to the benzoic acids. In this method, even though for the less nucleophilic 7-, 8-, and 9-membered amines 1 equiv. was used, corresponding benzoic acids were obtained in moderate
描述了一种有效且实用的制备 4-氮取代苯甲酸的方法。我们的方法包括 2,2,2,4'-四氟苯乙酮与胺的芳香取代,然后是苯甲酸的卤仿反应。在该方法中,即使对于亲核性较低的 7-、8-和 9-元胺 1 当量。使用时,相应的苯甲酸以中等至极好的收率获得。由于包括纯化在内的实验步骤简单,该方法适用于大规模合成。