反应详情

0.5 g (1.3 mmol) of N-((7-chloro-3-hydroxy-6-(2,2,2-trifluoroethyloxy)quinolin-2-yl)carbonyl)glycine (title compound from Example 31) was dissolved in 26 ml of methanolic formic acid (4.4% strength), and a further 26 ml of methanolic formic acid were added at 20° C. After addition of 0.5 g of Pd/C (10%), the mixture was stirred at 20° C. for 1 hour, the catalyst was filtered off, the filtrate was concentrated and the residue was crystallized with diisopropyl ether. 250 mg of product were obtained, melting point>300° C. (sintering at 207° C.).