Ethyl Acetate → Methyl 2-[2-methyl-4-(1-methyl-1H-pyrazol-4-yl)-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]-2-tert-butoxyacetate

HRID 1627902Notes

Reaction equation

HRID 1627902 reaction equation
Cl[C:2]1[C:7]([CH:8]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])[C:9]([O:11][CH3:12])=[O:10])=[C:6]([CH3:18])[N:5]=[C:4]2[S:19][C:20]3[CH2:25][CH2:24][CH2:23][CH2:22][C:21]=3[C:3]=12.C(=O)([O-])[O-].[K+].[K+].[CH3:32][N:33]1[CH:37]=[C:36](B2OC(C)(C)C(C)(C)O2)[CH:35]=[N:34]1.C(OCC)(=O)C>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:18][C:6]1[N:5]=[C:4]2[S:19][C:20]3[CH2:25][CH2:24][CH2:23][CH2:22][C:21]=3[C:3]2=[C:2]([C:36]2[CH:35]=[N:34][N:33]([CH3:32])[CH:37]=2)[C:7]=1[CH:8]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])[C:9]([O:11][CH3:12])=[O:10]

Participants

7

Reactant 4

HCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 66603984Methyl 2-[4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]-2-tert-butoxyacetate

Product 1

HCID 49804990Methyl 2-[2-methyl-4-(1-methyl-1H-pyrazol-4-yl)-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]-2-tert-butoxyacetateYield 58%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 18180031Water 1,2-dimethoxyethaneSolvent

Conditions

Temperature
140 °C

Procedure

To a solution of methyl 2-[4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]-2-tert-butoxyacetate (0.100 g; 0.262 mmol) in a mixture of DME-water (3:1) (1 mL) were added potassium carbonate (0.109 g; 0.786 mmol), tetrakis(triphenylphosphine)palladium(0) (0.015 g; 0.013 mmol) and 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (0.109 g; 0.524 mmol). The solution was stirred for 30 min at 140° C. under microwave irradiation. Ethyl acetate was added to the reaction mixture and the solution was washed with brine. The organic phase was dried over magnesium sulphate, filtered and concentrated under reduced pressure. Purification by flash chromatography on silica gel using a gradient of ethylacetate (5-80%) in heptane furnished 0.065 g (58%) of the title compound as a light yellow oil.

Workup

  1. washthe solution was washed with brine
  2. dry with materialThe organic phase was dried over magnesium sulphate
  3. filtrationfiltered
  4. concentrationconcentrated under reduced pressure
  5. customPurification by flash chromatography on silica gel using a gradient of ethylacetate (5-80%) in heptane

Sources & evidence

ORD record
ord-7a1cda23d6214aeca0c792b3ec6957f7
Source dataset
uspto-grants-2014_07
Patent number
US08785638B2

Reaction notes

Loading…