New Aspects of the Chemistry of 2,4.6-tris(trifluoromethyl) benzoic acid and related compounds
作者:Robert Filler、William K. Gnandt、Wei Chen、Shan Lin
DOI:10.1016/s0022-1139(00)80325-5
日期:1991.4
6-tris(trifluoromethyl)benzoic acid. The acid has been well characterized by spectral and pKa data. The acid chloride is formed only slowly under stringent conditions. The acid fails to undergo normal esterification with ethanol because of steric hindrance to the required tetrahedral intermediate. The ester does form via the linear acylium ion. A highly substituted phenolic ester of the acid has been obtained via
1,3,5-三(三氟甲基)苯与正丁基锂和二氧化碳反应生成高产率的2,4,6-三(三氟甲基)苯甲酸。该酸已经通过光谱和pK a数据很好地表征。酸性氯化物在严格条件下仅缓慢形成。由于对所需四面体中间体的空间位阻,该酸无法与乙醇进行正常酯化反应。酯的确通过线性酰基离子形成。经由混合酸酐获得了酸的高度取代的酚酯。描述了制备相应的苯乙酮和相关的乙烯基酮的尝试。