Ethyl Acetate → 2-[3-[Di(cyclopropylmethyl)amino]-2-(methylsulfanyl)pyrazolo [1,5-a]pyridin-7-yl]-3,5-dimethylphenol

HRID 1865022Notes

Reaction equation

HRID 1865022 reaction equation
B(Br)(Br)Br.ClCCl.[CH:8]1([CH2:11][N:12]([CH2:34][CH:35]2[CH2:37][CH2:36]2)[C:13]2[C:14]([S:32][CH3:33])=[N:15][N:16]3[C:21]([C:22]4[C:27]([CH3:28])=[CH:26][C:25]([CH3:29])=[CH:24][C:23]=4[O:30]C)=[CH:20][CH:19]=[CH:18][C:17]=23)[CH2:10][CH2:9]1.C(OCC)(=O)C>ClCCl>[CH:8]1([CH2:11][N:12]([CH2:34][CH:35]2[CH2:37][CH2:36]2)[C:13]2[C:14]([S:32][CH3:33])=[N:15][N:16]3[C:21]([C:22]4[C:27]([CH3:28])=[CH:26][C:25]([CH3:29])=[CH:24][C:23]=4[OH:30])=[CH:20][CH:19]=[CH:18][C:17]=23)[CH2:9][CH2:10]1

Participants

5

Reactant 3

HCID 8857Ethyl AcetateHCID 21984670N,N-dicyclopropylmethyl-N-[7-(2-methoxy-4,6-dimethylphenyl)-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl]amineHCID 22277759Boron tribromide dichloromethane

Product 1

HCID 1357235202-[3-[Di(cyclopropylmethyl)amino]-2-(methylsulfanyl)pyrazolo [1,5-a]pyridin-7-yl]-3,5-dimethylphenolYield 50.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A 1 M boron tribromide/dichloromethane solution (0.42 mL) was added to a solution of N,N-dicyclopropylmethyl-N-[7-(2-methoxy-4,6-dimethylphenyl)-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl]amine (35 mg) in dichloromethane (10 mL) at room temperature under a nitrogen atmosphere, and the mixture was stirred for 10 minutes. The reaction mixture was added to ice water, extraction was performed with ethyl acetate, and the organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The obtained residue was subjected to silica gel column chromatography, and the title compound (17 mg) was obtained from the n-hexane:ethyl acetate (6:1) fraction as white crystals.

Workup

  1. washthe organic layer was washed with brine
  2. dry with materialdried over anhydrous magnesium sulfate
  3. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-9f48034d15e54d77904e91f13362e994
Source dataset
uspto-grants-2009_12
Patent number
US07625925B2

Reaction notes

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