2-Butanamine, 2-methyl- → 6,7-dichloro-2,3-dimethoxy-5-{[2-(N-(1,1-dimethylpropyl)amino)ethyl]pyrazol-1-ylmethyl}quinoxaline

HRID 1957114Notes

Reaction equation

Cl[CH2:2][CH2:3][CH:4]([N:21]1[CH:25]=[CH:24][CH:23]=[N:22]1)[C:5]1[C:14]([Cl:15])=[C:13]([Cl:16])[CH:12]=[C:11]2[C:6]=1[N:7]=[C:8]([O:19][CH3:20])[C:9]([O:17][CH3:18])=[N:10]2.[CH3:26][C:27]([NH2:31])([CH3:30])[CH2:28][CH3:29]>C(O)C>[Cl:15][C:14]1[C:5]([CH:4]([CH2:3][CH2:2][NH:31][C:27]([CH3:30])([CH3:26])[CH2:28][CH3:29])[N:21]2[CH:25]=[CH:24][CH:23]=[N:22]2)=[C:6]2[C:11](=[CH:12][C:13]=1[Cl:16])[N:10]=[C:9]([O:17][CH3:18])[C:8]([O:19][CH3:20])=[N:7]2

Participants

Conditions

Temperature: 105 °C

Procedure

A mixture of 5-[(2-chloroethyl)pyrazol-1-ylmethyl]-6,7-dichloro-2,3-dimethoxyquinoxaline (150 mg, 0.37 mmol), 1,1-dimethyl-1-propylamine (3 mL) and ethanol (5 mL) were heated in a closed vessel at 105° C. for 7 hours. The mixture was cooled, the solvent was removed under reduced pressure, and the residue was dissolved in ethyl acetate (75 mL). The solution was washed with saturated aqueous sodium bicarbonate, dried (MgSO4) and concentrated under reduced pressure. Purification by flash chromatography (elution with dichloromethane, then an ethyl acetate/methanol/triethylamine gradient) gave 6,7-dichloro-2,3-dimethoxy-5-{[2-(N-(1,1-dimethylpropyl)amino)ethyl]pyrazol-1-ylmethyl}quinoxaline (65 mg, 38%), as a pale yellow solid.

Workup

temperatureThe mixture was cooled
customthe solvent was removed under reduced pressure
dissolutionthe residue was dissolved in ethyl acetate (75 mL)
washThe solution was washed with saturated aqueous sodium bicarbonate
dry with materialdried (MgSO4)
concentrationconcentrated under reduced pressure
customPurification by flash chromatography (
washelution with dichloromethane

Sources & evidence

ORD record: ord-7e8695b6787e4c51a6b28f32700ac456
Source dataset: uspto-grants-1998_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05783572

Reaction notes

Loading…