[NH2:1][C@H:2]1[CH2:6][CH2:5][CH2:4][C@@H:3]1[NH:7][C:8](=[O:14])[O:9][C:10]([CH3:13])([CH3:12])[CH3:11].Cl[C:16]1[CH:21]=[N:20][C:19]([C:22]([F:25])([F:24])[F:23])=[CH:18][N:17]=1.CCN(C(C)C)C(C)C>CS(C)=O>[F:23][C:22]([F:25])([F:24])[C:19]1[N:20]=[CH:21][C:16]([NH:1][C@H:2]2[CH2:6][CH2:5][CH2:4][C@@H:3]2[NH:7][C:8](=[O:14])[O:9][C:10]([CH3:11])([CH3:13])[CH3:12])=[N:17][CH:18]=1A solution of tert-butyl N-[(1S,2S)-2-aminocyclopentyl]carbamate (CAS number 586961-34-4; 1 g, 4.99 mmol), 2-chloro-5-(trifluoromethyl)pyrazine (CAS number 799557-87-2; 1.09 g, 5.99 mmol) and DIPEA (2.62 ml, 14.98 mmol) in DMSO (17 ml) was subjected to microwave irradiation at 140° C. for 1 hour. The reaction was partitioned between ethyl acetate and water, washed with water, brine, dried over magnesium sulfate and concentrated in vacuo. The resulting residue was purified by column chromatography (silica, 0-100% ethyl acetate/petrol) to afford the title compound.
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