excess of dissolved ozone. The reaction was assumed to be complete and oxygen was passed through the mixture for 5 min to remove excess ozone. The solution became colorless. Methanol (25 ml) was then added and the mixture was left to stand at room temperature for 1 hr. Work-up involved the addition of 50 ml of water followed by solvent removal to give a yellow oil (750 mg, 70%). 24 This yellow oil exhibited no C= N stretching ...