6-chloro-4-hydroxy-3-methyl-4-phenyl-1H-quinazolin-2-one → HCID 178518621, compound

Participants

Reaction Steps

A stirred mixture of 86.6 g (0.3 mole) of 6-chloro-3,4-dihydro-4-hydroxy-3-methyl-4-phenyl-2(1H)-quinazolinone and 62.5 g (0.9 mole) of hydroxylamine hydrochloride in 1500 ml ethanol was refluxed for 187 hr, and then cooled. The solid portion of the reaction mixture was collected on a filter, washed with ethanol, and dried in air to give 67.9 g (83%) of 6-chloro-4-phenyl-2(1H)-quinazolinone 3-oxide as yellow crystals: mp 267°-269°.

Provenance & Evidence