Cl.Cl.[CH3:3][C:4]1[CH:17]=[C:7]2[C:8]([C@H:12]3[CH2:14][C@@H:13]3[CH2:15][NH2:16])=[CH:9][CH:10]=[CH:11][N:6]2[N:5]=1.C(N(CC)CC)C.[CH:25]1([C:28](Cl)=[O:29])[CH2:27][CH2:26]1.C(O)C>O1CCCC1>[CH3:3][C:4]1[CH:17]=[C:7]2[C:8]([C@H:12]3[CH2:14][C@@H:13]3[CH2:15][NH:16][C:28]([CH:25]3[CH2:27][CH2:26]3)=[O:29])=[CH:9][CH:10]=[CH:11][N:6]2[N:5]=1To a suspension of 1-[(1S,2S)-2-(2-methylpyrazolo[1,5-a]pyridin-4-yl)cyclopropyl]methanamine dihydrochloride (750 mg, 2.74 mmol) and triethylamine (1.52 mL, 10.9 mmol) in tetrahydrofuran (27 mL) was added cyclopropanecarbonyl chloride (372 μL, 4.10 mmol) under ice-cooling, and the mixture was stirred at room temperature for 3 hr. Ethanol was added to the reaction solution. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography (methanol/ethyl acetate=0/100→5/95) to give the title compound (646 mg, yield 88%).
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