O-Methyltyramine → 5,6,7,8-Tetrahydro-5-[[2-(4-methoxyphenyl)ethyl]amino]-1-methyl-2(1H)-quinolinone

HRID 1195175Notes

Reaction equation

HRID 1195175 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][NH2:11])=[CH:5][CH:4]=1.[CH3:12][N:13]1[C:22]2[CH2:21][CH2:20][CH2:19][C:18](=O)[C:17]=2[CH:16]=[CH:15][C:14]1=[O:24].C1(C)C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][NH:11][CH:18]2[CH2:19][CH2:20][CH2:21][C:22]3[N:13]([CH3:12])[C:14](=[O:24])[CH:15]=[CH:16][C:17]2=3)=[CH:5][CH:4]=1

Participants

5

Reactant 3

HCID 4657O-MethyltyramineHCID 6101p-Toluenesulfonic acidHCID 104422421-Methyl-7,8-dihydroquinoline-2,5(1H,6H)-dione

Product 1

HCID 100868845,6,7,8-Tetrahydro-5-[[2-(4-methoxyphenyl)ethyl]amino]-1-methyl-2(1H)-quinolinoneYield 81%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A mixture of 2-(4-methoxyphenyl)ethylamine (5.6 g), 5,6,7,8-tetrahydro-1-methyl-5-oxo-2(1H)-quinolinone (5.5 g), and a catalytic amount of para-toluenesulfonic acid was heated in refluxing toluene (90 ml), with azeotropic removal of water, for 39 hrs. The solution was cooled and concentrated in vacuo. Sodium borohydride (1.1 g) was added to a solution of the residue in ethyl alcohol (90 ml), and the mixture was stirred at room temperature for 2 hrs. The mixture was concentrated in vacuo, the residue was quenched with water, and the mixture was extracted with dichloromethane. The combined organic layers were washed with brine, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated. The residue was washed with diethyl ether to afford 7.8 g (81%) of product. Recrystallization from ethyl acetate/hexanes provided the analytical sample, mp 97°-99° C.

Workup

  1. customwith azeotropic removal of water
  2. temperatureThe solution was cooled
  3. concentrationconcentrated in vacuo
  4. additionSodium borohydride (1.1 g) was added to a solution of the residue in ethyl alcohol (90 ml)
  5. concentrationThe mixture was concentrated in vacuo
  6. customthe residue was quenched with water
  7. extractionthe mixture was extracted with dichloromethane
  8. washThe combined organic layers were washed with brine
  9. dry with materialdried over anhydrous magnesium sulfate
  10. filtrationfiltered
  11. concentrationthe filtrate was concentrated
  12. washThe residue was washed with diethyl ether

Sources & evidence

ORD record
ord-78345234e23542b0b0c588e9cbe91438
Source dataset
uspto-grants-1992_05
Patent number
US05110815

Reaction notes

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