Cl[C:2]1[N:10]=[C:9]([C:11]([F:14])([F:13])[F:12])[CH:8]=[CH:7][C:3]=1[C:4]([OH:6])=[O:5].[NH:15]1[CH2:19][CH2:18][CH2:17][CH2:16]1>>[N:15]1([C:2]2[N:10]=[C:9]([C:11]([F:14])([F:13])[F:12])[CH:8]=[CH:7][C:3]=2[C:4]([OH:6])=[O:5])[CH2:19][CH2:18][CH2:17][CH2:16]1A mixture of 2-chloro-6-(trifluoromethyl)nicotinic acid (purchased from APOLLO, 5.0 g, 22.2 mmol) and pyrrolidine (40 ml, 562 mmol) was stirred for 24 hours at room temperature according to J. Med. Chem., 2005, 48, 71-90). Then the reaction mixture was evaporated in vacuo to give the title compound (5.5 g, 95%).
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