tert-butyl 4-(4-amino-6-(3-(pyrrolidin-1-yl)propyl)pyrrolo[2,1-f][1,2,4]triazin-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate → Tert-butyl 4-(4-amino-6-(3-(pyrrolidin-1-yl)propyl)pyrrolo[2,1-f][1,2,4]triazin-7-yl)piperidine-1-carboxylate

In a pressure reactor (50 mL), a mixture of the compound (132 mg, 0.31 mmol) prepared in Example 17 and platinum (IV) oxide in acetyl hydroxide (10 mL) was stirred under hydrogen atmosphere (3 atm). At 6 hours, the mixture was filtered through celite, eluting with acetyl hydroxide. The solvent was removed in vacuo. The resulting material extracted with DCM/sodium bicarbonate aqueous solution. The organic layers were dried over sodium sulfate, filtered and the solvent removed in vacuum to obtain the title compound (133 mg) having the following physical data.