Potassium Carbonate → 1-(1-Cyclopropylpiperazin-4-yl)-3-(4-methoxyphenyl)isoquinoline dihydrochloride

HRID 1006919Notes

Reaction equation

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

Participants

Conditions

Temperature: 100 °C

Procedure

1-Chloro-3-(4-methoxyphenyl)isoquinoline (514 mg), and 1-cyclopropylpiperazine hydrochloride salt (378 mg) described in JP-A 62-129273 were dissolved in dimethyl sulfoxide (7 ml) followed by the addition of potassium carbonate (788 mg), and the resulting mixture was stirred at 100° C. overnight. The reaction mixture was partitioned between ethyl acetate and water. The resulting organic layer was washed with water, dried (over MgSO4) and evaporated. The resulting residue was purified by silica gel column chromatography (methylene chloride/methanol system). The resulting product was converted into a hydrochloride in a conventional manner, and then recrystallized from ethanol/isopropyl ether, to give the hydrochloride of the title compound as yellow crystals (136 mg, yield; 16%).

Workup

customThe reaction mixture was partitioned between ethyl acetate and water
washThe resulting organic layer was washed with water
dry with materialdried (over MgSO4)
customevaporated
customThe resulting residue was purified by silica gel column chromatography (methylene chloride/methanol system)
customrecrystallized from ethanol/isopropyl ether

Sources & evidence

ORD record: ord-4873826616704035b1d69b190d5e438a
Source dataset: uspto-grants-2004_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06790844B2

Reaction notes

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