Chemoselectivity in the Reactions Between Ethyl 4,4,4-Trifluoro-3-oxobutanoate and Anilines: Improved Synthesis of 2-Trifluoromethyl-4- and 4-Trifluoromethyl-2-quinolinones
作者:Vadim A. Soloshonok、Dmitrii O. Berbasov
DOI:10.1055/s-2003-41043
日期:——
Chemoselectivity in the reactions between ethyl 4,4,4-trifluoroacetoacetate (ethyl 4,4,4-trifluoro-3-oxobutanoate) and various anilines was systematically studied as a function of the reaction conditions used (solvent/temperature, catalyst). The results obtained allowed chemoselective (>90%) synthesis of the corresponding ethyl 3-arylamino-4,4,4-trifluorobut-2-enoates and N-aryl-4,4,4-trifluoro-3-oxobutyramides
系统地研究了 4,4,4-三氟乙酰乙酸乙酯(4,4,4-三氟-3-氧代丁酸乙酯)和各种苯胺之间反应的化学选择性与所用反应条件(溶剂/温度、催化剂)的关系。获得的结果允许化学选择性 (>90%) 合成相应的 3-芳氨基-4,4,4-三氟丁-2-烯酸乙酯和 N-芳基-4,4,4-三氟-3-氧代丁酰胺,它们被环化分别得到2-三氟甲基-4-喹啉酮和4-三氟甲基-2-喹啉酮。