Hydroxylamine → 4-[4-[(hydroxyimino)methyl]-2-thiazolyl]-1-[[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]piperidine

HRID 1023032Notes

Reaction equation

HRID 1023032 reaction equation
[CH:1]([C:3]1[N:4]=[C:5]([CH:8]2[CH2:13][CH2:12][N:11]([C:14](=[O:26])[CH2:15][N:16]3[C:20]([CH3:21])=[CH:19][C:18]([C:22]([F:25])([F:24])[F:23])=[N:17]3)[CH2:10][CH2:9]2)[S:6][CH:7]=1)=O.[NH2:27][OH:28]>C(O)C>[OH:28][N:27]=[CH:1][C:3]1[N:4]=[C:5]([CH:8]2[CH2:13][CH2:12][N:11]([C:14](=[O:26])[CH2:15][N:16]3[C:20]([CH3:21])=[CH:19][C:18]([C:22]([F:25])([F:24])[F:23])=[N:17]3)[CH2:10][CH2:9]2)[S:6][CH:7]=1

Participants

4

Reactant 2

HCID 787HydroxylamineHCID 86631244HCID 86631244, compound2×

Product 1

HCID 866312434-[4-[(hydroxyimino)methyl]-2-thiazolyl]-1-[[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]piperidine

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a solution of 4-(4-formyl-2-thiazolyl)-1-[[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]piperidine (i.e. the product of Example 8, Step B) (0.8 g, 2.07 mmol) in ethyl alcohol (15 mL) was added hydroxylamine (50% aqueous solution, 0.136 g, 4.1 mmol) and the reaction mixture was stirred at room temperature for 10 minutes. The reaction mixture was concentrated under reduced pressure to give a yellow oil, which was purified by flash column chromatography on silica gel using 50% ethyl acetate in hexanes as eluant to give 0.7 g of the title compound as a white solid. This compound can be used as an intermediate to make compounds of the invention (via alkylation of the hydroxyimino group).

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. customto give a yellow oil, which
  3. customwas purified by flash column chromatography on silica gel using 50% ethyl acetate in hexanes as eluant

Sources & evidence

ORD record
ord-3a71642011fd4883ac3163078fbd4b9a
Source dataset
uspto-grants-2014_05
Patent number
US08722678B2

Reaction notes

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