反应详情

A solution of 1.61 g. (0.012 mole) of the sodium salt of 2-mercapto pyridine and 2.42 g. (0.01 mole) of 6-bromo-3-nitroimidazo [1,2-a] pyridine in 10 ml. N-methylpyrolidinone is heated at 150° C for 40 minutes under a nitrogen atmosphere. The cooled solution is poured onto 100 ml. of ice-water and the resultant suspension is extracted with ethyl acetate. The combined extracts are washed with saturated aqueous sodium chloride and dried over magnesium sulfate. Evaporation of the solvent to a small volume and dilution with N-hexane yields crystalline material. The solids are purified by chromatography on silica gel. Elution with methylene chloride yields pure 3-nitro 6-(2-pyridylthio) imidazo [1,2-a] pyridine.

1. additionThe cooled solution is poured onto 100 ml
2. extractionof ice-water and the resultant suspension is extracted with ethyl acetate
3. washThe combined extracts are washed with saturated aqueous sodium chloride
4. dry with materialdried over magnesium sulfate
5. customEvaporation of the solvent to a small volume and dilution with N-hexane
6. customyields crystalline material
7. customThe solids are purified by chromatography on silica gel
8. washElution with methylene chloride