反应详情

A stirred mixture of 28.28 g (0.085 mole) of 6-bromo-3,4-dihydro-4-hydroxy-3-methyl-4-phenyl-2(1H)-quinazolinone and 17.6 g (0.25 mole) of hydroxylamine hydrochloride in 425 ml of ethanol was refluxed for 192 hours and then cooled. The solid portion of the reaction mixture was collected on a filter, washed with ethanol, and dried in air to give 20.92 g (0.066 mole, 78%) of 6-bromo-4-phenyl-2(1H)-quinazolinone 3-oxide as light yellow crystals: mp 275°-276°.

1. temperaturewas refluxed for 192 hours
2. temperaturecooled
3. customThe solid portion of the reaction mixture was collected on a filter
4. washwashed with ethanol
5. customdried in air