Phosphorus oxychloride → 1-Chloro-3-(4-trifluoromethoxyphenyl)isoquinoline

HRID 1814524

Reaction equation

[F:1][C:2]([F:22])([F:21])[O:3][C:4]1[CH:9]=[CH:8][C:7]([C:10]2[NH:11][C:12](=O)[C:13]3[C:18]([CH:19]=2)=[CH:17][CH:16]=[CH:15][CH:14]=3)=[CH:6][CH:5]=1.P(Cl)(Cl)([Cl:25])=O>>[Cl:25][C:12]1[C:13]2[C:18](=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH:19]=[C:10]([C:7]2[CH:8]=[CH:9][C:4]([O:3][C:2]([F:22])([F:21])[F:1])=[CH:5][CH:6]=2)[N:11]=1

Participants

Reactant 2

HCID 24813Phosphorus oxychloride

HCID 225032223-(4-Trifluoromethoxyphenyl)isoquinolin-1-one

Product 1

HCID 225028651-Chloro-3-(4-trifluoromethoxyphenyl)isoquinoline

Procedure

The resulting 3-(4-trifluoromethoxyphenyl)isoquinolin-1-one (3.01 g) was reacted with phosphorus oxychloride (20 ml) according to the method of Example 10-2, to give 1-chloro-3-(4-trifluoromethoxyphenyl)isoquinoline, which was then reacted as it was with N-ethylpiperazine (40 ml) at 90° C. overnight. The reaction solution was evaporated, and to the resulting residue were added ethyl acetate and purified water. The ethyl acetate layer was washed with water and brine, and dried over magnesium sulfate. The solvent was evaporated, and the resulting residue was purified by silica gel column chromatography (chloroform/methanol system), to give 3.65 g of the free compound of the title compound as a pale yellow oil.

Sources & evidence

ORD record: ord-34887bc2f0ab4743be77ac503c3488d1
Source dataset: uspto-grants-2005_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06875761B2

Linked notes

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