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To a solution of ethyl 7-chloro-2-(4-methoxyphenyl)pyrazolo[1,5-a]pyrimidine-5-carboxylate (767 mg; 2.31 mmol) in methylene chloride (10 mL), methanol (10 mL) and triethylamine (2 mL) was added 10% Pd on carbon (77 mg) and the mixture was cooled to 0° C. The reaction flask was put under vacuum and then hydrogen was introduced using a balloon. A second cycle of vacuum and hydrogen purge was performed and the mixture was stirred at 0° C. for 1.5 h. The mixture was flushed with two cycles of vacuum and nitrogen, diluted with methylene chloride and then filtered through a 0.45 micron filter to remove the catalyst. Concentration afforded the crude product which was triturated in methanol (25 mL) and filtered to afford 485 mg (71%) of the title compound. LCMS m/z 298.1 (M+H)+, ret. time=2.53 min.

1. customA second cycle of vacuum and hydrogen purge
2. customThe mixture was flushed with two cycles of vacuum and nitrogen
3. additiondiluted with methylene chloride
4. filtrationfiltered through a 0.45 micron
5. filtrationfilter
6. customto remove the catalyst
7. concentrationConcentration
8. customafforded the crude product which
9. customwas triturated in methanol (25 mL)
10. filtrationfiltered