Tributylphosphine → Methyl(4-methyl-6-((2-methyl-6-(trifluoromethyl)pyridin-3-yl)methoxy)-1-benzothiophen-3-yl)acetate

HRID 591398Notes

Reaction equation

HRID 591398 reaction equation
[CH3:1][O:2][C:3](=[O:16])[CH2:4][C:5]1[C:9]2[C:10]([CH3:15])=[CH:11][C:12]([OH:14])=[CH:13][C:8]=2[S:7][CH:6]=1.[CH3:17][C:18]1[C:23]([CH2:24]O)=[CH:22][CH:21]=[C:20]([C:26]([F:29])([F:28])[F:27])[N:19]=1.C(P(CCCC)CCCC)CCC.C1CCN(C(N=NC(N2CCCCC2)=O)=O)CC1>C1COCC1>[CH3:1][O:2][C:3](=[O:16])[CH2:4][C:5]1[C:9]2[C:10]([CH3:15])=[CH:11][C:12]([O:14][CH2:24][C:23]3[C:18]([CH3:17])=[N:19][C:20]([C:26]([F:29])([F:27])[F:28])=[CH:21][CH:22]=3)=[CH:13][C:8]=2[S:7][CH:6]=1

Participants

6

Reactant 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 2760122(2-Methyl-6-(trifluoromethyl)pyridin-3-yl)methanolHCID 121001301Methyl(6-hydroxy-4-methyl-1-benzothiophen-3-yl)acetate

Product 1

HCID 89775295Methyl(4-methyl-6-((2-methyl-6-(trifluoromethyl)pyridin-3-yl)methoxy)-1-benzothiophen-3-yl)acetateYield 91.6%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a mixture of methyl(6-hydroxy-4-methyl-1-benzothiophen-3-yl)acetate (150 mg) and THF (dry) (5 mL) were added (2-methyl-6-(trifluoromethyl)pyridin-3-yl)methanol (133 mg), tri-n-butylphosphine (0.204 mL) and ADDP (192 mg) at room temperature. The mixture was stirred at room temperature for 4 h. The insoluble material was removed by filtration, and the filtrate was concentrated in vacuo. The residue was purified by silica gel column chromatography (EtOAc/hexane) to give the title compound (238 mg).

Workup

  1. customThe insoluble material was removed by filtration
  2. concentrationthe filtrate was concentrated in vacuo
  3. customThe residue was purified by silica gel column chromatography (EtOAc/hexane)

Sources & evidence

ORD record
ord-8bfb848d220d41678cd37a795211d878
Source dataset
uspto-grants-2016_01
Patent number
US09238639B2

Reaction notes

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