反应详情

To a suspension of 1,1′-carbonyldiimidazole (1.621 g, 9.994 mmol) in anhydrous tetrahydrofuran (20 ml) was added tert-butyl carbazate (1.322 g, 10.00 mmol), and the mixture was stirred at room temperature for 1.5 hr. 4-(2-Aminoethyl)phenol (1.371 g, 9.991 mmol) was added and the mixture was stirred at room temperature for 6 hr. Water (40 ml) was added to the reaction mixture and the precipitate was collected by filtration, washed 3 times with water and twice with ethyl acetate, and dried under reduced pressure to give tert-butyl 2-{[2-(4-hydroxyphenyl)ethyl]carbamoyl}hydrazinecarboxylate (2.417 g, 8.184 mmol, yield 81.9%) as a white solid.

1. stirringthe mixture was stirred at room temperature for 6 hr
2. filtrationthe precipitate was collected by filtration
3. washwashed 3 times with water
4. dry with materialtwice with ethyl acetate, and dried under reduced pressure