反应详情

A DMF solution (1 ml) of 27.2 mg (0.10 mmol) of 1-(1-(4-tert-butylphenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl)-ethanone and 20.4 mg (0.10 mmol) of 4-(1H-tetrazol-5-yl)-benzoic hydrazide synthesized by the method disclosed in WO03/037328 was heated at 60° C. for 6 hours with one drop of concentrated hydrochloric acid, and the precipitated solid was washed with water and collected by filtration. The solid was mixed with 1M aqueous sodium hydroxide and filtered. 1M Hydrochloric acid was added to the filtrate, and the precipitated solid was collected by filtration to obtain 5.9 mg of the desired product as a brown solid (yield 12%).

1. washthe precipitated solid was washed with water
2. filtrationcollected by filtration
3. additionThe solid was mixed with 1M aqueous sodium hydroxide
4. filtrationfiltered
5. addition1M Hydrochloric acid was added to the filtrate
6. filtrationthe precipitated solid was collected by filtration