HCID 46681952, compound → HCID 68499878, compound

HRID 2381075Notes

Reaction equation

[F:1][C:2]([F:26])([F:25])[C:3]1[N:7]2[N:8]=[C:9]([N:12]3[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][CH2:13]3)[CH:10]=[CH:11][C:6]2=[N:5][N:4]=1>[Pd].CO>[F:26][C:2]([F:1])([F:25])[C:3]1[N:7]2[N:8]=[C:9]([N:12]3[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:22])([CH3:24])[CH3:23])=[O:19])[CH2:14][CH2:13]3)[CH2:10][CH2:11][C:6]2=[N:5][N:4]=1

Participants

Conditions

Temperature: 50 °C

Procedure

10% Palladium on carbon (0.563 g, 0.53 mmol) and tert-butyl 4-(3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)piperazine-1-carboxylate (1.97 g, 5.29 mmol) were stirred in MeOH (30 mL) under an atmosphere of hydrogen at atmospheric temperature and pressure for 3 days. The catalyst was removed by filtration and the solvents evaporated. The residues were re-dissolved in MeOH (50 mL), 5% palladium on carbon (0.4 g, 0.09 mmol) was added and the mixture was stirred under an atmosphere of hydrogen at 50° C. and 5 Bar pressure until complete conversion was obtained. The catalyst was removed by filtration, washed with MeOH then DCM/MeOH and the solvent was evaporated to afford tert-butyl 4-(3-(trifluoromethyl)-7,8-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)piperazine-1-carboxylate (1.880 g, 9%) as a solid.

Workup

customThe catalyst was removed by filtration
customthe solvents evaporated
dissolutionThe residues were re-dissolved in MeOH (50 mL)
custom5 Bar pressure until complete conversion was obtained
customThe catalyst was removed by filtration
washwashed with MeOH
customDCM/MeOH and the solvent was evaporated

Sources & evidence

ORD record: ord-8bb61b72e947420db617b223b74fe6a3
Source dataset: uspto-grants-2012_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08258140B2

Reaction notes

Loading…