Water → HCID 18452521, compound

Participants

Reaction Steps

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).

Provenance & Evidence