Hydrochloric Acid → (4-(3,5-Bis(trifluoromethyl)phenyl)piperidin-1-yl)(4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridin-3-yl)methanone Hydrochloride

HRID 58459Notes

Reaction equation

HRID 58459 reaction equation
[F:1][C:2]([F:38])([F:37])[C:3]1[CH:4]=[C:5]([CH:13]2[CH2:18][CH2:17][N:16]([C:19]([C:21]3[C:25]4[CH2:26][N:27](C(OC(C)(C)C)=O)[CH2:28][CH2:29][C:24]=4[NH:23][N:22]=3)=[O:20])[CH2:15][CH2:14]2)[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.CO.C(Cl)[Cl:42].Cl>CCOCC>[ClH:42].[F:12][C:9]([F:10])([F:11])[C:7]1[CH:6]=[C:5]([CH:13]2[CH2:18][CH2:17][N:16]([C:19]([C:21]3[C:25]4[CH2:26][NH:27][CH2:28][CH2:29][C:24]=4[NH:23][N:22]=3)=[O:20])[CH2:15][CH2:14]2)[CH:4]=[C:3]([C:2]([F:1])([F:37])[F:38])[CH:8]=1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 21226129Dichloromethane methanolHCID 118483360tert-butyl 3-(4-(3,5-bis(trifluoromethyl)phenyl)piperidine-1-carbonyl)-6,7-dihydro-1H-pyrazolo[4,3-c]pyridine-5(4H)-carboxylate

Product 1

HCID 118483429(4-(3,5-Bis(trifluoromethyl)phenyl)piperidin-1-yl)(4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridin-3-yl)methanone HydrochlorideYield 99%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Procedure

To a solution of tert-butyl 3-(4-(3,5-bis(trifluoromethyl)phenyl)piperidine-1-carbonyl)-6,7-dihydro-1H-pyrazolo[4,3-c]pyridine-5(4H)-carboxylate (53, 142 mg, 0.26 mmol) in 1:1 MeOH/CH2Cl2 (2 mL) was added HCl (2N in Et2O, 2 mL). The mixture was stirred for 18 h at ambient temperature. The reaction mixture was diluted with Et2O (20 mL) and the resulting solids were collected by filtration to give (4-(3,5-bis(trifluoromethyl)phenyl)piperidin-1-yl)(4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridin-3-yl)methanone hydrochloride (54) as an off-white solid (127 mg, >99%): 1H NMR (500 MHz, DMSO-d6) δ 9.28 (br s, 2H), 8.02-7.98 (m, 2H), 7.96-7.92 (m, 1H), 5.30-5.09 (m, 1H), 4.78-4.55 (m, 1H), 4.28-4.14 (m, 2H), 3.43-3.28 (m, 2H, overlaps with H2O), 3.26-3.07 (m, 2H), 3.02-2.90 (m, 2H), 2.89-2.75 (m, 1H), 2.00-1.82 (m, 2H), 1.80-1.61 (m, 2H), missing N—H pyrazole; ESI MS m/z 447 [M+H]+.

Workup

  1. filtrationthe resulting solids were collected by filtration

Sources & evidence

ORD record
ord-b21fe324d2944aada9c4d6e1d305876f
Source dataset
uspto-grants-2016_09
Patent number
US09434727B2

Reaction notes

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