Hydrochloric Acid → 6-Amino-5-{3-[(2,5-dimethyl-2H-pyrazole-3-carbonyl)-amino]-phenylethynyl}-nicotinic acid

HRID 607485Notes

Reaction equation

HRID 607485 reaction equation
[NH2:1][C:2]1[C:11]([C:12]#[C:13][C:14]2[CH:19]=[CH:18][CH:17]=[C:16]([NH:20][C:21]([C:23]3[N:27]([CH3:28])[N:26]=[C:25]([CH3:29])[CH:24]=3)=[O:22])[CH:15]=2)=[CH:10][C:5]([C:6]([O:8]C)=[O:7])=[CH:4][N:3]=1.[OH-].[K+].Cl>CO.O.[Cl-].[Na+].O>[NH2:1][C:2]1[C:11]([C:12]#[C:13][C:14]2[CH:19]=[CH:18][CH:17]=[C:16]([NH:20][C:21]([C:23]3[N:27]([CH3:28])[N:26]=[C:25]([CH3:29])[CH:24]=3)=[O:22])[CH:15]=2)=[CH:10][C:5]([C:6]([OH:8])=[O:7])=[CH:4][N:3]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 14797Potassium HydroxideHCID 57657963methyl 6-amino-5-[(3-{[(1,3-dimethyl-1H-pyrazol-5-yl)carbonyl]amino}phenyl)ethynyl]nicotinate

Product 1

HCID 576578676-Amino-5-{3-[(2,5-dimethyl-2H-pyrazole-3-carbonyl)-amino]-phenylethynyl}-nicotinic acidYield 84%

Reagents, catalysts & solvents 2

HCID 22242641Methanol--water (1/1)SolventHCID 57417360Sodium chloride; waterSolvent

Procedure

A solution of methyl 6-amino-5-[(3-{[(1,3-dimethyl-1H-pyrazol-5-yl)carbonyl]amino}phenyl)ethynyl]nicotinate (51 mg, 0.13 mmol) and KOH (37 mg, 0.65 mmol) in 4.0 ml MeOH:H2O (3:1) was heated at 65□C. for 1 hour 40 minutes. The pH of the mixture was adjusted to pH 4 using 10% HCl, brine added, and the aqueous extracted with EtOAc. The combined EtOAc layers were dried with anhydrous Na2SO4 and rotary evaporated. The light yellow solid was triturated with hot EtOAc to give the title compound as an off-white solid (41 mg, 84%).

Workup

  1. additionadded
  2. extractionthe aqueous extracted with EtOAc
  3. dry with materialThe combined EtOAc layers were dried with anhydrous Na2SO4 and rotary evaporated
  4. customThe light yellow solid was triturated with hot EtOAc

Sources & evidence

ORD record
ord-b15b63f6213d495a8f3710f273887243
Source dataset
uspto-grants-2011_03
Patent number
US07915443B2

Reaction notes

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