Sodium Hydroxide → (5-tert-Butyl-2-{4-chloro-3-[2-(tetrahydro-pyran-2-yloxy)-ethoxy]-phenyl}-2H-pyrazol-3-yl)-carbamic acid 2,2,2-trichloro-ethyl ester

HRID 711161Notes

Reaction equation

HRID 711161 reaction equation
[C:1]([C:5]1[CH:6]=[C:7]([NH2:27])[N:8]([C:10]2[CH:15]=[CH:14][C:13]([Cl:16])=[C:12]([O:17][CH2:18][CH2:19][O:20][CH:21]3[CH2:26][CH2:25][CH2:24][CH2:23][O:22]3)[CH:11]=2)[N:9]=1)([CH3:4])([CH3:3])[CH3:2].[OH-].[Na+].Cl[C:31]([O:33][CH2:34][C:35]([Cl:38])([Cl:37])[Cl:36])=[O:32]>CCOC(C)=O>[Cl:36][C:35]([Cl:38])([Cl:37])[CH2:34][O:33][C:31](=[O:32])[NH:27][C:7]1[N:8]([C:10]2[CH:15]=[CH:14][C:13]([Cl:16])=[C:12]([O:17][CH2:18][CH2:19][O:20][CH:21]3[CH2:26][CH2:25][CH2:24][CH2:23][O:22]3)[CH:11]=2)[N:9]=[C:5]([C:1]([CH3:4])([CH3:2])[CH3:3])[CH:6]=1

Participants

5

Reactant 3

HCID 14798Sodium HydroxideHCID 870632,2,2-Trichloroethyl chloroformateHCID 1177296295-tert-Butyl-2-{4-chloro-3-[2-(tetrahydro-pyran-2-yloxy)-ethoxy]-phenyl}-2H-pyrazol-3-ylamine

Product 1

HCID 117729763(5-tert-Butyl-2-{4-chloro-3-[2-(tetrahydro-pyran-2-yloxy)-ethoxy]-phenyl}-2H-pyrazol-3-yl)-carbamic acid 2,2,2-trichloro-ethyl esterYield 101%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

To a solution of Intermediate 53a (445 mg, 1.13 mmol) in EtOAc (4 mL) and 1N sodium hydroxide solution (2.40 mL, 2.40 mmol) was added 2,2,2-trichloroethyl chloroformate (165 μL, 1.20 mmol), and the mixture stirred vigorously at RT for 1.5 h. The aqueous layer was extracted with EtOAc (2×10 mL), and then the combined organics dried and concentrated in vacuo. The residue was purified by FCC, using 0-30% EtOAc in cyclohexane, to give the title compound (650 mg, 100%). LCMS (Method 3): Rt 4.90 min, m/z 568, 570, 572 [MH+].

Workup

  1. extractionThe aqueous layer was extracted with EtOAc (2×10 mL)
  2. customthe combined organics dried
  3. concentrationconcentrated in vacuo
  4. customThe residue was purified by FCC

Sources & evidence

ORD record
ord-524e2f8af336413ab371947e43dc5ee7
Source dataset
uspto-grants-2015_11
Patent number
US09181242B2

Reaction notes

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