反应详情

To a solution of N-boc-amino-cyclopropanecarboxylic acid (1.01 g, 5.00 mmol) in 2 mL of DMF was added carbonyldiimidazole (0.812 g, 5.01 mmol). This reaction mixture was stirred at room temperature for 6 h. N-Hydroxy-acetamidine (0.374 g, 5.05 mmol) was added. This reaction mixture was stirred at room temperature for 2 h then heated at 100° C. for 16 h. After cooling to room temperature, the reaction mixture was diluted with water. The resultant precipitate was collected by filtration, washed with acetonitrile and water and air-dried to give 1.05 g of [1-(3-methyl-1,2,4-oxadiazol-5-yl)-cyclopropyl]-carbamic acid tert-butyl ester as a white solid, m/z 240 [M+1]+.

1. stirringThis reaction mixture was stirred at room temperature for 2 h
2. temperaturethen heated at 100° C. for 16 h
3. temperatureAfter cooling to room temperature
4. filtrationThe resultant precipitate was collected by filtration
5. washwashed with acetonitrile and water
6. customair-dried