[CH3:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][C:10]=1[C:11]([F:14])([F:13])[F:12])[C:5](O)=[O:6].Cl.[CH3:16][NH:17][O:18][CH3:19].CN1CCOCC1.Cl.CN(C)CCCN=C=NCC>CN(C1C=CN=CC=1)C.C(Cl)Cl.CC(OC)(C)C.CN(C=O)C>[CH3:19][O:18][N:17]([CH3:16])[C:5](=[O:6])[C:4]1[CH:8]=[CH:9][C:10]([C:11]([F:14])([F:13])[F:12])=[C:2]([CH3:1])[CH:3]=1
To a suspension of 3-methyl-4-trifluoromethyl-benzoic acid from step 6 (14.1 g, 69.1 mmol), N,O-dimethylhydroxylamine hydrochloride (10.78 g, 111 mmol), N-methylmorpholine (12.14 mL, 111 mmol) and 4-DMAP (844 mg, 691 mmol) in DCM (230 mL) at 0° C. were added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) (15.98 g, 82.9 mmol) and DMF (85 mL). The mixture was warmed up to 23° C. and was stirred for 18 h under nitrogen atmosphere. The mixture was diluted with TBME, washed with water and twice brine, dried over Na2SO4. Removal of the solvent in vacuum left the title compound as a brown oil (16.92 g, 99%), which was used without further purification. MS (ISP) 248.0 [M+H].
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