Diisopropylethylamine → N-(5-(3,3-difluoropiperidin-1-yl)-1-(2-((trimethylsilyl)methoxy)ethyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide

HRID 1466654Notes

Reaction equation

HRID 1466654 reaction equation
[F:1][C:2]1([F:22])[CH2:7][CH2:6][CH2:5][N:4]([C:8]2[N:12]([CH2:13][CH2:14][O:15][CH2:16][Si:17]([CH3:20])([CH3:19])[CH3:18])[N:11]=[CH:10][C:9]=2[NH2:21])[CH2:3]1.CCN(C(C)C)C(C)C.[N:32]1[N:36]2[CH:37]=[CH:38][CH:39]=[N:40][C:35]2=[C:34]([C:41](Cl)=[O:42])[CH:33]=1>C1COCC1>[F:22][C:2]1([F:1])[CH2:7][CH2:6][CH2:5][N:4]([C:8]2[N:12]([CH2:13][CH2:14][O:15][CH2:16][Si:17]([CH3:19])([CH3:18])[CH3:20])[N:11]=[CH:10][C:9]=2[NH:21][C:41]([C:34]2[CH:33]=[N:32][N:36]3[CH:37]=[CH:38][CH:39]=[N:40][C:35]=23)=[O:42])[CH2:3]1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 19623233Pyrazolo[1,5-a]pyrimidine-3-carbonyl chlorideHCID 668507645-(3,3-difluoropiperidin-1-yl)-1-(2-((trimethylsilyl)methoxy)ethyl)-1H-pyrazol-4-amine

Product 1

HCID 66850749N-(5-(3,3-difluoropiperidin-1-yl)-1-(2-((trimethylsilyl)methoxy)ethyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamideYield 60%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 5-(3,3-difluoropiperidin-1-yl)-1-(2-((trimethylsilyl)methoxy)ethyl)-1H-pyrazol-4-amine (1.2 g, 3.61 mmol) in 30 mL THF was added DIPEA (1.3 mL, 7.22 mmol) and pyrazolo[1,5-a]pyrimidine-3-carbonyl chloride (720 mg, 3.97 mmol) in THF (50 mL) at 0° C. After addition was complete, the mixture was warmed to room temperature, then stirred overnight. The mixture was concentrated in vacuo and the residue was purified by silica gel column chromatogaphy (hexanes:EtOAc=3:1 to 1:1) to afford 1.0 g (60%) of N-(5-(3,3-difluoropiperidin-1-yl)-1-(2-((trimethylsilyl)methoxy)ethyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide. LCMS (ESI) m+H=478.2; 1H NMR (400 MHz, CDCl3) δ: 9.49 (s, 1H), 8.87 (dd, 1H), 8.75 (s, 1H), 8.71 (dd, 1H), 7.94 (s, 1H), 7.10 (dd, 1H), 5.40 (s, 2H), 3.67 (m, 6H), 2.06 (s, 2H), 1.93 (m, 2H), 0.95 (m, 2H), 0 (s, 9H).

Workup

  1. additionAfter addition
  2. concentrationThe mixture was concentrated in vacuo
  3. customthe residue was purified by silica gel column chromatogaphy (hexanes:EtOAc=3:1 to 1:1)

Sources & evidence

ORD record
ord-8a5dbd67044b4f0c8a6f14ec1f9f61e8
Source dataset
uspto-grants-2015_04
Patent number
US08999998B2

Reaction notes

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