Hydrogen Peroxide → HCID 66997518, compound

HRID 2066571Notes

Reaction equation

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

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of ethyl 6-(3-chloro-4-fluorobenzyl)-4-hydroxy-5-oxo-5,6,7,8-tetrahydro-2,6-naphthyridine-1-carboxylate (22 g, 58 mmol), glacial acetic acid (500 mL), and hydrogen peroxide (65.8 mL, 30% by weight in water) was heated at 100° C. for four hours. The resultant solution was cooled in an ice bath to 25° C. and treated with saturated aqueous sodium sulfite solution while keeping the reaction mixture below 40° C. When starch paper test showed complete consumption of residual peroxide, the solution was concentrated to two third of its volume, pH was adjusted to ˜3 with aqueous HCl and the solution was extracted with dichloromethane (3 times). The organic extracts were combined, dried over anhydrous sodium sulfate, filtered and concentrated under vacuum to afford the title product as oil,

Workup

customthe reaction mixture below 40° C
customconsumption of residual peroxide
concentrationthe solution was concentrated to two third of its volume
extractionthe solution was extracted with dichloromethane (3 times)
dry with materialdried over anhydrous sodium sulfate
filtrationfiltered
concentrationconcentrated under vacuum

Sources & evidence

ORD record: ord-b92b31e387d143bba6bc70f3320aad43
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08293731B2

Reaction notes

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