HCID 23433529, compound → HCID 23433685, compound

HRID 1938443Notes

Reaction equation

HRID 1938443 reaction equation
[C:1]([O:5][C:6]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[CH:15][CH:16]=2)[C:11]([CH2:24]Br)=[CH:10][C:9]1([CH3:27])[CH3:26])=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH3:28][Mg+].[Br-]>CCOCC.[Cu]I>[C:1]([O:5][C:6]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[CH:15][CH:16]=2)[C:11]([CH2:24][CH3:28])=[CH:10][C:9]1([CH3:27])[CH3:26])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 2

HCID 23433529HCID 23433529, compoundHCID 178418689HCID 178418689, compound

Product 1

HCID 23433685HCID 23433685, compoundYield 91%

Reagents, catalysts & solvents 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 3283Diethyl EtherSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of N-tert-butyloxycarbonyl-4-bromomethyl-1,2-dihydro-2,2-dimethyl-6-phenylquinoline (structure 12, where R1 =phenyl) (20 mg, 0.047 mmol) and copper (I) iodide (4 mg, 0.02 mmol) in 1 mL of anhydrous ether at 0° C. was added MeMgBr (0.060 mL, 3M in ether). After 30 min of stirring at 0° C., the reaction mixture was quenched with saturated NH4Cl and extracted with ethyl acetate. The organic layers were combined, dried (Na2SO4) and concentrated in vacuo to provide an oil which was purified by SGC (silica gel, hexane/ethyl acetate, 9:1) giving N-tert-butyloxycarbonyl-4-ethyl-1,2-dihydro-2,2-dimethyl-6-phenylquinoline (16 mg, 91%). 1H NMR (acetone-d6) 7.65 (d, J=8.7, 2H), 7.51 (dd, J=8.0, 1.7, 1H), 7.29 (m, 2H), 7.43 (m, 3H), 5.56 (s, 1H), 2.55 (q, J=8.9, 2H), 1.51 (s, 6H), 1.57 (s, 9H), 1.19 (t, J=8.9, 3H). To a solution of N-tert-butyloxycarbonyl-4-ethyl-1,2-dihydro-2,2-dimethyl-6-phenylquinoline (16 mg, 0.044 mmol) in 1 mL of dichloromethane at 0° C. was added 0.3 mL of trifluoroacetic acid. After 10 min of stirring, the reaction was quenched with saturated NaHCO3, and extracted with dichloromethane. The organic layers were combined, dried (Na2SO4) and concentrated in vacuo to provide an oil that was purified by SGC (silica gel, hexane/ethyl acetate, 7:3) to provide 3 mg (25%) of Compound 112. Data for Compound 112: 1H NMR (acetone-d6) 7.55 (d, J=8.6, 2H), 7.37 (m, 3H), 7.23 (m, 2H), 6.59 (d, J=8.26, 1H), 5.38 (s, 1H), 3.76 (s, 1H), 2.48 (q, J=7.4, 2H), 1.29 (s, 6H), 1.17 (t, J=7.4, 3H).

Workup

  1. customthe reaction mixture was quenched with saturated NH4Cl
  2. extractionextracted with ethyl acetate
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated in vacuo
  5. customto provide an oil which
  6. customwas purified by SGC (silica gel, hexane/ethyl acetate, 9:1)

Sources & evidence

ORD record
ord-ec8702a49d034281a90d462f0d0ea44a
Source dataset
uspto-grants-1997_12
Patent number
US05693647

Reaction notes

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