反应详情

0.77 g of 5-(4-aminophenyl)pyrazole and 1.00 g of 2,4,6,7-tetramethyl-5-nitrodihydrobenzofuran-2-aldehyde were dissolved in 33 ml of methylene chloride and 0.5 ml of acetic acid was added, followed by stirring at room temperature for 30 minutes. To the resulting reaction solution, 1.70 g of sodium triacetoxyborohydride was added, followed by stirring at room temperature for 20 hours. After the completion of the reaction, the reaction solution was poured into water, neutralized with an aqueous sodium hydroxide solution and then extracted with chloroform. The organic layer was washed with hydrochloric acid water, neutralized with an aqueous sodium hydroxide solution, and then the organic layer was washed with saturated saline and dried over anhydrous magnesium sulfate. The solvent was concentrated under reduced pressure to obtain 1.5 g of the objective product.

1. additionwas added
2. stirringby stirring at room temperature for 20 hours
3. customAfter the completion of the reaction
4. extractionextracted with chloroform
5. washThe organic layer was washed with hydrochloric acid water
6. washthe organic layer was washed with saturated saline
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationThe solvent was concentrated under reduced pressure