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75 ml of toluene was added to 7.5 g of sodium hydride (60% in oil), and the mixture was cooled to 0° C., and 70 ml of ethylene glycol was added thereto over the course of 30 minutes. To the obtained solution was added 25.0 g (120 mmol) of 2-chloro-3,5-dinitropyridine, the temperature was raised to room temperature, and the mixture was stirred for 15 minutes. The resulting solution was added to 200 ml of a saturated aqueous ammonium chloride solution, and the resulting mixture was extracted with 200 ml of ethyl acetate. Washing the ethyl acetate extract with saturated saline, drying over anhydrous sodium sulfate, filtering and distilling under reduced pressure (bath temp. 40°-60° C., 40°-20mmHg) yielded yellow crystals, which were recrystallized from ethanol to obtain 23.2g (101 mmol) of 2-(3,5-dinitro-2-pyridyloxy)ethanol as pale yellow crystals (yield: 82%).

1. customover the course of 30 minutes
2. temperaturethe temperature was raised to room temperature
3. extractionthe resulting mixture was extracted with 200 ml of ethyl acetate
4. washWashing the ethyl acetate
5. extractionextract with saturated saline
6. dry with materialdrying over anhydrous sodium sulfate
7. filtrationfiltering
8. distillationdistilling under reduced pressure (bath temp. 40°-60° C., 40°-20mmHg)
9. customyielded yellow crystals, which
10. customwere recrystallized from ethanol