Hydrochloric Acid → 2-Iodo-3-nitrobenzoic acid

温度

60 °C

A mixture of methyl 2-(acetylamino)-3-nitrobenzoate (4.19 g, 17.6 mmol) and potassium hydroxide (4.93 g, 88.0 mmol) in water (20 mL) was stirred at 60° C. overnight. The resulting solid was collected by filtration, washed with methanol, and is suspended in water (14 mL). Concentrated hydrochloric acid (7.3 mL, 88 mmol) was added to the suspension, and a solution of sodium nitrite (1.88 g, 27.3 mmol) in water (10 mL) was added at 0° C. over 1.5 hr. The reaction mixture was added to a solution of potassium iodide (4.53 g, 27.3 mmol) and iodine (3.73 g, 14.7 mmol) in dimethyl sulfoxide (130 mL) at 5° C. over 20 min. The resulting reaction mixture was stirred at 50° C. for 20 min, and extracted with ethyl acetate. The extract was washed with water, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was washed with hexane to give the title compound (3.71 g, yield 72%).

1. filtrationThe resulting solid was collected by filtration
2. washwashed with methanol
3. customThe resulting reaction mixture
4. stirringwas stirred at 50° C. for 20 min
5. extractionextracted with ethyl acetate
6. washThe extract was washed with water
7. dry with materialdried over anhydrous sodium sulfate
8. customthe solvent was evaporated under reduced pressure
9. washThe residue was washed with hexane

ORDレコード

ord-0783df7c8fab4e3980b65a77e067d3ac

出典データセット

uspto-grants-2012_02

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08110585B2