(4-Chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)(2,4-dimethyloxazol-5-yl)methanol → (4-Chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)(2,4-dimethyloxazol-5-yl)methanone

HRID 526847Notes

Reaction equation

[Cl:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([CH:12]([C:14]3[O:18][C:17]([CH3:19])=[N:16][C:15]=3[CH3:20])[OH:13])[CH:10]=2)[N:5]=[C:4]([O:21][CH3:22])[C:3]=1[CH2:23][C:24]1[CH:29]=[CH:28][C:27]([C:30]([F:33])([F:32])[F:31])=[CH:26][CH:25]=1>[O-2].[O-2].[Mn+4].O1CCOCC1>[Cl:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([C:12]([C:14]3[O:18][C:17]([CH3:19])=[N:16][C:15]=3[CH3:20])=[O:13])[CH:10]=2)[N:5]=[C:4]([O:21][CH3:22])[C:3]=1[CH2:23][C:24]1[CH:25]=[CH:26][C:27]([C:30]([F:32])([F:31])[F:33])=[CH:28][CH:29]=1

Participants

Conditions

Temperature: 85 °C

Procedure

To a flask containing (4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)(2,4-dimethyloxazol-5-yl)methanol (960 mg, 2.01 mmol, Intermediate 11: step a) was added 1,4-dioxane (50 mL) followed by manganese dioxide (900 mg, 103 mmol) at room temperature. The mixture was heated to 85° C., for 60 minutes, and then the contents were filtered through Celite® while still warm and rinsed with THF. The solution was concentrated and the crude material was triturated with Et2O to afford the title compound as a white solid. The mother liquors were re-purified by chromatography on silica gel (2% MeOH-DCM increasing to 5% MeOH) to provide additional title compound.

Workup

filtrationthe contents were filtered through Celite®
temperaturewhile still warm
washrinsed with THF
concentrationThe solution was concentrated
customthe crude material was triturated with Et2O

Sources & evidence

ORD record: ord-098f5180c4334c91ab497b1f181cb3c6
Source dataset: uspto-grants-2016_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09346782B2

Reaction notes

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