Potassium Carbonate → (S)-2-tert-butoxy-2-(5-(4-chlorophenyl)-2,7-dimethylquinolin-6-yl)ethyl pivalate

HRID 931754Notes

Reaction equation

HRID 931754 reaction equation
[C:1]([O:7][CH2:8][C@H:9]([C:15]1[C:16](Br)=[C:17]2[C:22](=[CH:23][C:24]=1[CH3:25])[N:21]=[C:20]([CH3:26])[CH:19]=[CH:18]2)[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].[Cl:28][C:29]1[CH:34]=[CH:33][C:32](B(O)O)=[CH:31][CH:30]=1.C([O-])([O-])=O.[K+].[K+]>COCCOC.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>[C:1]([O:7][CH2:8][C@@H:9]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])[C:15]1[C:16]([C:32]2[CH:33]=[CH:34][C:29]([Cl:28])=[CH:30][CH:31]=2)=[C:17]2[C:22](=[CH:23][C:24]=1[CH3:25])[N:21]=[C:20]([CH3:26])[CH:19]=[CH:18]2)(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 742994-Chlorophenylboronic acidHCID 66630692(S)-2-(5-bromo-2,7-dimethylquinolin-6-yl)-2-tert-butoxyethyl pivalate

Product 1

HCID 66631480(S)-2-tert-butoxy-2-(5-(4-chlorophenyl)-2,7-dimethylquinolin-6-yl)ethyl pivalateYield 73%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
110 °C

Procedure

Pd(PPh3)4 (69 mg, 0.06 mmol) was added to a mixture (S)-2-(5-bromo-2,7-dimethylquinolin-6-yl)-2-tert-butoxyethyl pivalate (5E) (325 mg, 0.75 mmol), 4-chlorophenylboronic acid (175 mg, 1.1 mmol), K2CO3 (1.3 mL 2 M in water, 2.6 mmol) in 1,2-dimethoxyethane (10 mL). The reaction mixture was flushed with nitrogen, heated at 110° C. for 30 min under microwave, and then the volatile component was removed in vacuo. The residue was dissolved in ethyl acetate (100 mL), washed with NaHCO3 solution, water and brine, dried over Na2SO4, filtered and concentrated in vacuo. The obtained residue was purified by flash chromatography to provide the desired product (256 mg, 73%). LCMS-ESI+ (m/z): 468.3, 469.3 (M+H)+.

Workup

  1. customThe reaction mixture was flushed with nitrogen
  2. customthe volatile component was removed in vacuo
  3. dissolutionThe residue was dissolved in ethyl acetate (100 mL)
  4. washwashed with NaHCO3 solution, water and brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe obtained residue was purified by flash chromatography

Sources & evidence

ORD record
ord-f2398db004314798b91954d32d885309
Source dataset
uspto-grants-2016_03
Patent number
US09296758B2

Reaction notes

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