[C:1]1([C:7]([C:9]2[C:10]3[S:21][CH:20]=[CH:19][C:11]=3[N:12]=[C:13]([C:15]([F:18])([F:17])[F:16])[N:14]=2)=O)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.Cl.[NH2:23][OH:24]>N1C=CC=CC=1>[C:1]1([C:7]([C:9]2[C:10]3[S:21][CH:20]=[CH:19][C:11]=3[N:12]=[C:13]([C:15]([F:18])([F:17])[F:16])[N:14]=2)=[N:23][OH:24])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1A solution of phenyl 2-trifluoromethylthieno[3,2-d]pyrimidin-4-ylmethanone (60 mg, 0.19 mmol) and hydroxylamine hydrochloride (0.04 g, 0.58 mmol) in pyridine (2 mL) was refluxed for 1 h, concentrated in vacuo, treated with toluene (2 mL), concentrated in vacuo and the resulting solid dissolved in EtOAc (5 mL), washed with water (3 mL) and concentrated in vacuo to give the title compound (62 mg, 98%), a mixture of geometrical isomers, as an oily solid.
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