申请人:Union Carbide Agricultural Products Company, Inc.
公开号:US04267333A1
公开(公告)日:1981-05-12
2-Trifluoromethyl cinchoninic acids can be prepared in high yields by reaction of an alkali metal 2-aminophenylglyoxylate and 1,1,1-trifluoroacetone in the presence of a weak acid and a metal salt of a weak acid. Preferably reaction is effected by first hydrolyzing isatin, or a substituted isatin, in the presence of an alkali metal hydroxide to produce the alkali metal 2-aminophenylglyoxylate, and then reacting this intermediate product with 1,1,1-trifluoroacetone without isolating it from the reaction medium.
2-三氟甲基奎宁酸可以在弱酸和弱酸的金属盐的存在下,通过碱金属2-氨基苯甘酰酸和1,1,1-三氟丙酮的反应高产率制备。最好的反应方式是先在碱金属氢氧化物的存在下水解吲哚或取代吲哚,以产生碱金属2-氨基苯甘酰酸,然后在不从反应介质中分离中间产物的情况下将其与1,1,1-三氟丙酮反应。