Imidazole → N-{2-(tert-butyldimethylsilyloxy)ethyl}-1-(4-{3-[(2R)-2-methylpyrrolidin-1-yl]propoxy}phenyl)-1H-pyrazole-4-carboxamide

HRID 215783Notes

Reaction equation

HRID 215783 reaction equation
[OH:1][CH2:2][CH2:3][NH:4][C:5]([C:7]1[CH:8]=[N:9][N:10]([C:12]2[CH:17]=[CH:16][C:15]([O:18][CH2:19][CH2:20][CH2:21][N:22]3[CH2:26][CH2:25][CH2:24][C@H:23]3[CH3:27])=[CH:14][CH:13]=2)[CH:11]=1)=[O:6].[C:28]([Si:32](Cl)([CH3:34])[CH3:33])([CH3:31])([CH3:30])[CH3:29].N1C=CN=C1.CN(C)C=O>[Cl-].[Na+].O>[Si:32]([O:1][CH2:2][CH2:3][NH:4][C:5]([C:7]1[CH:8]=[N:9][N:10]([C:12]2[CH:17]=[CH:16][C:15]([O:18][CH2:19][CH2:20][CH2:21][N:22]3[CH2:26][CH2:25][CH2:24][C@H:23]3[CH3:27])=[CH:14][CH:13]=2)[CH:11]=1)=[O:6])([C:28]([CH3:31])([CH3:30])[CH3:29])([CH3:34])[CH3:33]

Participants

6

Reactant 4

HCID 795ImidazoleHCID 6228DimethylformamideHCID 28928tert-Butyldimethylsilyl chlorideHCID 42610555N-(2-hydroxyethyl)-1-(4-{3-[(2R)-2-methylpyrrolidin-1-yl]propoxy}phenyl)-1H-pyrazole-4-carboxamide

Product 1

HCID 59541712N-{2-(tert-butyldimethylsilyloxy)ethyl}-1-(4-{3-[(2R)-2-methylpyrrolidin-1-yl]propoxy}phenyl)-1H-pyrazole-4-carboxamideYield 84.2%

Reagents, catalysts & solvents 1

HCID 57417360Sodium chloride; waterSolvent

Procedure

A mixture of N-(2-hydroxyethyl)-1-(4-{3-[(2R)-2-methylpyrrolidin-1-yl]propoxy}phenyl)-1H-pyrazole-4-carboxamide prepared in Example 66 (0.500 g), tert-butylchlorodimethylsilane (0.303 g), imidazole (0.273 g) and N,N-dimethylformamide (5.0 mL) was stirred overnight at room temperature. The reaction mixture was diluted with brine and extracted with ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluting solvent: n-hexane:ethyl acetate=1:1) to give the titled compound (0.550 g) as a colorless solid.

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialThe organic layer was dried over magnesium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customThe resulting residue was purified by silica gel column chromatography (eluting solvent: n-hexane:ethyl acetate=1:1)

Sources & evidence

ORD record
ord-781f828689d14ea0841757eb3b4d95eb
Source dataset
uspto-grants-2012_06
Patent number
US08193176B2

Reaction notes

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