Water → N2-[4-(benzyloxy)phenyl]-5-fluoropyridine-2,3-diamine

HRID 82674Notes

Reaction equation

[CH2:1]([O:8][C:9]1[CH:15]=[CH:14][C:12]([NH2:13])=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl[C:17]1[C:22]([N+:23]([O-])=O)=[CH:21][C:20]([F:26])=[CH:19][N:18]=1.C([O-])([O-])=O.[K+].[K+].O>CN(C=O)C>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]([NH:13][C:17]2[C:22]([NH2:23])=[CH:21][C:20]([F:26])=[CH:19][N:18]=2)=[CH:14][CH:15]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 4-(benzyloxy)aniline (2.26 g), 2-chloro-5-fluoro-3-nitropyridine (2 g) and K2CO3 (3.13 g) in DMF (20 mL) was stirred at 120° C. for 5 h, treated with water, and extracted with AcOEt. The organic layer was dried over MgSO4 and concentrated in vacuo. The residue was suspended in IPE and collected by filtration. The obtained solid was dissolved in EtOH (20 mL), and Pt/C (2 g) was added. Under H2 atmosphere, the mixture was stirred for 1 h, filtered and evaporated. The residue was chromatographed on silica gel eluting with Hexane/AcOEt to give the title compound (0.85 g).

Workup

extractionextracted with AcOEt
dry with materialThe organic layer was dried over MgSO4
concentrationconcentrated in vacuo
filtrationcollected by filtration
dissolutionThe obtained solid was dissolved in EtOH (20 mL)
additionPt/C (2 g) was added
stirringUnder H2 atmosphere, the mixture was stirred for 1 h
filtrationfiltered
customevaporated
customThe residue was chromatographed on silica gel eluting with Hexane/AcOEt

Sources & evidence

ORD record: ord-be773db1a9ff4bd0be5645fd46b4d8dd
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846713B2

Reaction notes

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