反应详情

A solution of 5-cyanophthalide (1 g, 6.28 mmol) and hydroxylamine (50% in water, 0.77 cm3, 0.83 g, 12.6 mmol, 2 eq) in EtOH (50 cm3) was stirred at room temperature for 60 hours and then under reflux for 3 hours. After cooling to room temperature and standing overnight, the solid formed was collected by filtration and dried in high vacuum line to give the product N′-hydroxy-1-oxo-1,3-dihydroisobenzofuran-5-carboximidamide (1.04 g, 86.2%) as a white solid, mp 223-226° C. (decomposed).

1. temperatureunder reflux for 3 hours
2. customthe solid formed
3. filtrationwas collected by filtration
4. customdried in high vacuum line