Hydrogen chloride-ethyl acetate → (R)-4-(5-(2,6-difluorophenyl)-1H-indazol-3-yl)-N-(piperidin-3-yl)pyrimidin-2-amine

HRID 1529291Notes

Reaction equation

HRID 1529291 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([F:8])[C:3]=1[C:9]1[CH:10]=[C:11]2[C:15](=[CH:16][CH:17]=1)[N:14](C1CCCCO1)[N:13]=[C:12]2[C:24]1[CH:29]=[CH:28][N:27]=[C:26]([NH:30][C@@H:31]2[CH2:36][CH2:35][CH2:34][N:33](C(OC(C)(C)C)=O)[CH2:32]2)[N:25]=1.C(OC(C)=O)C.Cl>CCOC(C)=O>[F:8][C:4]1[CH:5]=[CH:6][CH:7]=[C:2]([F:1])[C:3]=1[C:9]1[CH:10]=[C:11]2[C:15](=[CH:16][CH:17]=1)[NH:14][N:13]=[C:12]2[C:24]1[CH:29]=[CH:28][N:27]=[C:26]([NH:30][C@@H:31]2[CH2:36][CH2:35][CH2:34][NH:33][CH2:32]2)[N:25]=1

Participants

4

Reactant 2

HCID 21866389Hydrogen chloride-ethyl acetateHCID 67960035(3R)-tert-butyl 3-(4-(5-(2,6-difluorophenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-3-yl)pyrimidin-2-ylamino)piperidine-1-carboxylate

Product 1

HCID 67959816(R)-4-(5-(2,6-difluorophenyl)-1H-indazol-3-yl)-N-(piperidin-3-yl)pyrimidin-2-amine

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

To a solution of (R)-tert-butyl 3-aminopiperidine-1-carboxylate (0.28 g, 1.32 mmol) in DMF (10 mL) was treated with NaH (0.056 g, 2.34 mmol) and stirred for 15 min. The reaction mixture was cooled to 0° C. and 3-(2-chloropyrimidin-4-yl)-5-(2,6-difluorophenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (0.5 g, 1.17 mmol) was added. The resulting mixture was stirred at RT for 2 h. The reaction mixture was quenched with ice cold water and extracted with EtOAc. The organic layer was dried over Na2SO4, filtered and concentrated to yield crude compound. Purification by silica gel column chromatography, eluting with 5-15% EtOAc and hexanes to obtain (3R)-tert-butyl 3-(4-(5-(2,6-difluorophenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-3-yl)pyrimidin-2-ylamino)piperidine-1-carboxylate (0.2 g, 18%). MS (ESI, pos. ion) m/z: 591.1 (M+1). To a solution of (3R)-tert-butyl 3-(4-(5-(2,6-difluorophenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-3-yl)pyrimidin-2-ylamino)piperidine-1-carboxylate (0.3 g, 0.5 mmol) in EtOAc (10 mL) was added EtOAc-HCl (10 mL) and stirred at RT for 16 h. The reaction mixture was quenched with saturated NaHCO3 solution and extracted with EtOAc. The organic layer was washed with water and brine, dried over Na2SO4 and concentrated. The crude product was purified by reverse-phase preparative HPLC (using a AG/PP/C18-15/021 column, eluting with gradient, A: 5% TFE+0.01% TFA in Water; B: ACN). The title compound was obtained. MS (ESI, pos. ion) m/z: 407.2 (M+1).

Workup

  1. customThe reaction mixture was quenched with saturated NaHCO3 solution
  2. extractionextracted with EtOAc
  3. washThe organic layer was washed with water and brine
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated
  6. customThe crude product was purified by reverse-phase preparative HPLC (
  7. washeluting with gradient

Sources & evidence

ORD record
ord-a96c3e8ca49144deae05456fb29e6e23
Source dataset
uspto-grants-2015_07
Patent number
US09090593B2

Reaction notes

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