Potassium Carbonate → (2S)-2-tert-butoxy-2-(5-(2,3-dihydropyrano[4,3,2-de]quinolin-7-yl)-2,7-dimethylquinolin-6-yl)ethyl pivalate

HRID 931733Notes

Reaction equation

HRID 931733 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.[O:29]1[C:40]2[C:41]3[C:36]([C:37](B(O)O)=[CH:38][CH:39]=2)=[N:35][CH:34]=[CH:33][C:32]=3[CH2:31][CH2:30]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:37]2[C:36]3[C:41]4=[C:32]([CH2:31][CH2:30][O:29][C:40]4=[CH:39][CH:38]=2)[CH:33]=[CH:34][N:35]=3)=[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 66630692(S)-2-(5-bromo-2,7-dimethylquinolin-6-yl)-2-tert-butoxyethyl pivalateHCID 66631384(2,3-Dihydropyrano[4,3,2-de]quinolin-7-yl)boronic acid hydrochloride

Product 1

HCID 66631664(2S)-2-tert-butoxy-2-(5-(2,3-dihydropyrano[4,3,2-de]quinolin-7-yl)-2,7-dimethylquinolin-6-yl)ethyl pivalateYield 20.5%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 80711,2-DimethoxyethaneSolvent

Procedure

Pd(PPh3)4 (4 mg, 0.0037 mmol) was added to a mixture (S)-2-(5-bromo-2,7-dimethylquinolin-6-yl)-2-tert-butoxyethyl pivalate (5E) (16 mg, 0.037 mmol), 2,3-dihydropyrano[4,3,2-de]quinolin-7-ylboronic acid hydrochloride (6A) (23 mg, 0.073 mmol) and K2CO3 (0.083 mL 2 M in water, 1.66 mmol) in 1,2-dimethoxyethane (2 mL). The reaction mixture was flushed with nitrogen, microwaved at 120° C. for 90 min and the volatile component was removed in vacuo. The residue was dissolved in ethyl acetate (50 mL), washed with NaHCO3 solution, water and brine, dried over Na2SO4, filtered and concentrated in vacuo. The obtained residue was purified by prep-HPLC to provide 6B as a white solid (4 mg as TFA salt, 18%). LCMS-ESI+ (m/z): 527.3 (M+H)+.

Workup

  1. customThe reaction mixture was flushed with nitrogen
  2. custommicrowaved at 120° C. for 90 min
  3. customthe volatile component was removed in vacuo
  4. dissolutionThe residue was dissolved in ethyl acetate (50 mL)
  5. washwashed with NaHCO3 solution, water and brine
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customThe obtained residue was purified by prep-HPLC

Sources & evidence

ORD record
ord-f6229c74a57b46b8869a1c9c942b5a6f
Source dataset
uspto-grants-2016_03
Patent number
US09296758B2

Reaction notes

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