Cl[C:2]1[N:7]2[N:8]=[CH:9][CH:10]=[C:6]2[N:5]=[C:4]([CH:11]2[CH2:15][CH2:14][N:13]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:12]2)[CH:3]=1.[NH3:23]>CO>[NH2:23][C:2]1[N:7]2[N:8]=[CH:9][CH:10]=[C:6]2[N:5]=[C:4]([CH:11]2[CH2:15][CH2:14][N:13]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:12]2)[CH:3]=1A mixture of tert-butyl 3-(7-chloropyrazolo[1,5-a]pyrimidin-5-yl)pyrrolidine-1-carboxylate (3.40 g, 10.5 mmol) in a solution of ammonia in MeOH (7N, 20 mL) was heated in sealed vessel at 80° C. for 5 h. The reaction mixture was cooled down and concentrated in vacuo. The residue was dried in high vacuum and used for the next step without further purification. LC/MS RT=1.30 min (5 min method). Mass calculated for, M+H 303.17, observed 318.19.
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