HCID 13388141, compound → KC 764

Reaction equation

[CH3:1][C:2]1[C:10]([C:11](=[O:18])[C:12]2[CH:17]=[CH:16][CH:15]=[N:14][CH:13]=2)=[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][N:4]2[N:3]=1.[H][H]>C(O)C.[C].[Pd]>[CH3:1][C:2]1[C:10]([C:11](=[O:18])[C:12]2[CH2:17][CH2:16][CH2:15][NH:14][CH:13]=2)=[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][N:4]2[N:3]=1

Participants

Procedure

Ten g of 2-methyl-3-nicotinoyl pyrazolo[1,5-a]pyridine was dissolved in 150 ml of absolute ethanol and 2 g of 10% palladium carbon was added to the solution. The mixture was hydrogenated in an autoclave at 13 atm. of hydrogen at a temperature in the range of 55° to 58° C. for 3 hours. The mixture was filtered and the filtrate was evaporated under reduced pressure in order to remove the solvent. The residue was recrystallized from ethyl acetate to afford the title compound in yield of 8.5 g, mp 207°-208° C.