反应详情

39.41 g (145.7 mmol) of tert-butyl N′-(1-propyl-heptylidene)-hydrazinecarboxylate are dissolved in a mixture of 100 ml of THF and 150 ml of methanol and, after 10.65 g (169 mmol) of sodium cyanoborohydride have been added, the mixture is stirred for 1 hour at room temperature. 100 ml of 6N HCl are added dropwise in the course of 30 minutes and, after the addition has ended, the mixture is refluxed for 1 hour. The mixture is neutralized with 6N NaOH solution, then, after the non-aqueous solvents have been removed, extracted three times with dichloromethane, and, after the mixture has been dried over sodium sulphate, the solvent is removed in vacuo. This gives 23.90 g (95%) of a yellow oil.

1. additionafter the addition
2. temperaturethe mixture is refluxed for 1 hour
3. customafter the non-aqueous solvents have been removed
4. extractionextracted three times with dichloromethane
5. dry with materialafter the mixture has been dried over sodium sulphate
6. customthe solvent is removed in vacuo