反应详情

To a stirred suspension of 50 mg (1.25 mmol) of sodium hydride in 5 ml of THF, 100 mg (0.62 mmol) of 4-amino-3,5-dichloropyridine in 5 ml of THF was added. The mixture was allowed stirring 30 minutes at room temperature and then cooled to 0° C. 150 mg (0.52 mmol) of 5-acetyl-2-ethyl-4-nitro-6-phenylpyridazin-3(2H)-one (Dal Piaz, V et al, J. Med. Chem. 1997, 40, 1417) in 10 ml of THF was added. The reaction was allowed to warm to room temperature and to continue stirring for 12 hours. The mixture was acidified with 2N HCl to pH 2. Ethyl acetate was added and the organic layer was washed with water, brine, dried over Na2SO4 anhydride and evaporated. The residue obtained (210 mg) was purified by column chromatography (silica gel, hexane/ethyl acetate 1:1) to yield the title compound (35 mg, 16.7% yield).

1. additionwas added
2. temperaturecooled to 0° C
3. temperatureto warm to room temperature
4. stirringto continue stirring for 12 hours
5. washthe organic layer was washed with water, brine
6. dry with materialdried over Na2SO4 anhydride
7. customevaporated
8. customThe residue obtained (210 mg)
9. customwas purified by column chromatography (silica gel, hexane/ethyl acetate 1:1)