Sodium Hydroxide → (S)-tert-butyl 1-(3-(3-chloro-4-cyano-2-methylphenyl)-1H-pyrazol-1-yl)propan-2-ylcarbamate

HRID 872559Notes

Reaction equation

HRID 872559 reaction equation
[Cl:1][C:2]1[C:9]([CH3:10])=[C:8]([C:11]2[CH:15]=[CH:14][NH:13][N:12]=2)[CH:7]=[CH:6][C:3]=1[C:4]#[N:5].[OH-].[Na+].CS(O[CH2:23][C@@H:24]([NH:26][C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH3:25])(=O)=O>C1(C)C=CC=CC=1.[Br-].C([N+](CCCC)(CCCC)CCCC)CCC>[Cl:1][C:2]1[C:9]([CH3:10])=[C:8]([C:11]2[CH:15]=[CH:14][N:13]([CH2:25][C@@H:24]([NH:26][C:27](=[O:28])[O:29][C:30]([CH3:31])([CH3:33])[CH3:32])[CH3:23])[N:12]=2)[CH:7]=[CH:6][C:3]=1[C:4]#[N:5]

Participants

6

Reactant 3

HCID 14798Sodium HydroxideHCID 10753379(S)-Methanesulphonic acid 2-Boc-aminopropyl esterHCID 178422100HCID 178422100, compound

Product 1

HCID 70656088(S)-tert-butyl 1-(3-(3-chloro-4-cyano-2-methylphenyl)-1H-pyrazol-1-yl)propan-2-ylcarbamate

Reagents, catalysts & solvents 2

HCID 74236Tetrabutylammonium BromideCatalystHCID 1140TolueneSolvent3×

Procedure

2-Chloro-3-methyl-4-(1H-pyrazol-3-yl)benzonitrile (1.96 g, 8.96 mmol) was dissolved in toluene (20 ml). To this solution an aqueous solution of NaOH (1M, 20 ml) and tetrabutylammonium bromide (0.58 g, 1.79 mmol) was added, respectively. (S)-2-(tert-butoxycarbonylamino)propyl methanesulfonate (4.54 g, 17.92 mmol) was dissolved in toluene (20 ml) and added to the reaction mixture. After 96 h of vigorous stirring at RT the reaction mixture was diluted with toluene and washed several times with water, dried with Na2SO4, filtered and evaporated. After CombiFlash purification using heptane/EtOAc as eluents, 1.85 g of the product was collected. 1H-NMR (400 MHz; d6-DMSO): δ 1.02 (d, 3H), 1.31 (s, 9H), 2.57 (s, 3H), 3.91 (m, 1H), 4.13 (m, 2H), 6.62 (m, 1H), 6.87 (d, 1H), 7.66 (d, 1H), 7.79 (d, 1H), 7.84 (d, 1H).

Workup

  1. additionadded to the reaction mixture
  2. washwashed several times with water
  3. dry with materialdried with Na2SO4
  4. filtrationfiltered
  5. customevaporated
  6. customAfter CombiFlash purification
  7. custom1.85 g of the product was collected

Sources & evidence

ORD record
ord-2c28332d5ecc492988f77e5b91710ca5
Source dataset
uspto-grants-2015_03
Patent number
US08975254B2

Reaction notes

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