Formaldehyde → HCID 69102806, compound

Participants

Reaction Steps

27.9 g of 4,4′-biphenol and 48.6 g of aqueous formaldehyde (37%) were added into a 4-neck reactor equipped with a stirrer, temperature controller, and condenser, and then 80 ml of 1,4-dioxane was added as a solvent. The mixture was stirred at room temperature, and to the resulting solution 27.9 g aniline in 30 ml 1,4-dioxane was dripped at a rate of one drop per second while stirring. Upon completion of the dripping the solution was heated and reacted under refluxing for 10 hours. The reaction mixture was dried in a rotary evaporator under vacuum to obtain a pale orange solid. The pale orange solid was dissolved in ethyl ether and washed with 3N NaOH aqueous three times, followed by 1 N aqueous HCl solution several times and pure water several times, before removing the solvent in vacuo to obtain pale orange 4,4′-biphenol dihydrobenzoxazine solid. m.p. 170° C. EA: Calcd.: C: 80.00%; H: 5.71%; N: 6.66%. Found: C: 80.30%; H: 5.73%; N: 6.56%.

Provenance & Evidence