Sodium hydride → 5-tert-butyl-2-methyl-2H-pyrazole-3-carboxylic acid (5-tert-butyl-2-methyl-2H-pyrazole-3-carbonyl)-[3-nitro-6-(2-trifluoromethyl-phenyl)-pyridin-2-yl]-amide

HRID 1481579Notes

Reaction equation

HRID 1481579 reaction equation
[F:1][C:2]([F:20])([F:19])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[N:14]=[C:13]([NH2:15])[C:12]([N+:16]([O-:18])=[O:17])=[CH:11][CH:10]=1.[H-].[Na+].[C:23]([C:27]1[CH:28]=[C:29]([C:33](Cl)=[O:34])[N:30]([CH3:32])[N:31]=1)([CH3:26])([CH3:25])[CH3:24]>C1COCC1>[C:23]([C:27]1[CH:28]=[C:29]([C:33]([N:15]([C:13]2[C:12]([N+:16]([O-:18])=[O:17])=[CH:11][CH:10]=[C:9]([C:4]3[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=3[C:2]([F:1])([F:19])[F:20])[N:14]=2)[C:33]([C:29]2[N:30]([CH3:32])[N:31]=[C:27]([C:23]([CH3:25])([CH3:24])[CH3:26])[CH:28]=2)=[O:34])=[O:34])[N:30]([CH3:32])[N:31]=1)([CH3:26])([CH3:25])[CH3:24]

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 27356843-(Tert-Butyl)-1-Methyl-1H-Pyrazole-5-Carbonyl ChlorideHCID 592800986-(2-Trifluoromethyl-phenyl)-3-nitro-pyridin-2-ylamine

Product 1

HCID 674108155-tert-butyl-2-methyl-2H-pyrazole-3-carboxylic acid (5-tert-butyl-2-methyl-2H-pyrazole-3-carbonyl)-[3-nitro-6-(2-trifluoromethyl-phenyl)-pyridin-2-yl]-amide

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

A solution of 3-nitro-6-(2-trifluoromethyl-phenyl)-pyridin-2-ylamine (200 mg, 0.706 mmol, prepared as described in Example 22, STEP B) in THF (15 mL) was treated with NaH (84.7 mg, 2.12 mmol) at room temperature for 1 h. The resulting mixture was treated with a solution of 5-tert-butyl-2-methyl-2H-pyrazole-3-carbonyl chloride (156 mg, 0.777 mmol) as a solution in THF (6 mL) and allowed to stir at room temperature for 15 min. The mixture was quenched with saturated aqueous NH4Cl (25 mL) and extracted twice with EtOAc (35 mL). The combined extracts were dried over MgSO4 and concentrated in vacuo. The residue was purified on a 24-g SEPRA Si 50 SPE column (Isco system: Flow rate=20 mL/min; Eluent=EtOAc/hexanes, 1:99 v/v for 5 min, then 1:99 to 1:9 v/v over 40 min) to yield 5-tert-butyl-2-methyl-2H-pyrazole-3-carboxylic acid (5-tert-butyl-2-methyl-2H-pyrazole-3-carbonyl)-[3-nitro-6-(2-trifluoromethyl-phenyl)-pyridin-2-yl]-amide as a yellow solid. Mass Spectrum (LCMS, APCI pos.): Calculated for C30H32F3N7O4: 612.3 (M+H). Measured: 612.1.

Workup

  1. customThe mixture was quenched with saturated aqueous NH4Cl (25 mL)
  2. extractionextracted twice with EtOAc (35 mL)
  3. dry with materialThe combined extracts were dried over MgSO4
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified on a 24-g SEPRA Si 50 SPE column (Isco system
  6. waitEluent=EtOAc/hexanes, 1:99 v/v for 5 min

Sources & evidence

ORD record
ord-1609b431d7cc4a7a970d1ff4e71ffbe7
Source dataset
uspto-grants-2016_08
Patent number
US09409915B2

Reaction notes

Loading…