Water → HCID 18452521, compound
Reaction equation
F[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[C:4]([O:11][CH2:12][CH2:13][O:14][CH3:15])[CH:3]=1.[CH3:16][O:17][C:18]1[CH:25]=[CH:24][C:21]([CH2:22][NH2:23])=[CH:20][CH:19]=1.C(OCC)(=O)C.O>CS(C)=O>[CH3:16][O:17][C:18]1[CH:25]=[CH:24][C:21]([CH2:22][NH:23][C:2]2[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[C:4]([O:11][CH2:12][CH2:13][O:14][CH3:15])[CH:3]=2)=[CH:20][CH:19]=1Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of 2-methoxy-ethanol in 4 ml dry THF, was added tert-butoxide (378 mg, 3.37 mmol) at 0° C. The resulting mixture was added dropwise to the solution of 2,4-difluoro-1-nitro-benzene (536 mg, 3.37 mmol) in 5 ml dry THF at 0° C. The mixture was stirred at 0° C. for 30 minutes, then diluted with ethyl acetate and washed with brine. The organic layers were combined and concentrated in vacuo to give 4-Fluoro-2-(2-methoxy-ethoxy)-1-nitro-benzene. 4-Fluoro-2-(2-methoxy-ethoxy)-1-nitro-benzene (1.35 g, 6.3 mmol) was treated with p-methoxybenzylamine (1.64 mL, 12.6 mmol) in dimethyl sulfoxide at 80° C. in a sealed tube for 4 hr. After work up with ethyl acetate and water isolated N-(4-methoxybenzyl)3-(2-methoxyethoxy)-4-nitrobenzenamine intermediate. RP-HPLC: 2.13 min; ES-MS (M+H)+=346; To this intermediate added trifluoroacetic acid and heated the reaction mixture at 80° C. for 1 hr to deprotect the p-methoxybenzyl functionality to give final product 3-(2-methoxyethoxy)-4-nitobenzenamine. RP-HPLC: 1.14 min; ES-MS (M+H)+=213; 1H-NMR (MeOH-d4) δ (ppm): 3.4 (s, 3 H), 3.8 (t, 2 H), 4.10 (t, 2 H), 6.2 (dd, 1 H), 6.26 (d, 1 H), 7.76 (d, 1 H).
Sources & evidence
- ORD record
- ord-9b1378cc67ab4faca1628a8ac1e47dd8
- Source dataset
- uspto-grants-2007_04
- Patent number
- US07205296B2
Reaction notes
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