Formaldehyde → HCID 131727140, compound

Participants

Reaction Steps

34.2 g (0.15 mole) of bisphenol-A and 48.6 g (0.6 mole) of aqueous formaldehyde (37%) were added into a 4-neck reactor equipped with a stirrer, temperature controller, and condenser, and then 100 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 yellowish solid. The yellowish solid was dissolved in ethyl ether and washed with 3N aqueous NaOH three times, followed by 1 N aqueous HCl solution several times and pure water several times, before removing the solvent in vacuo. The dried solid was ground to obtain bisphenol-A dihydrobenzoxazine powder, which is yellowish white. m.p. 110° C. EA: Calcd.: C: 80.50%; H: 6.49%; N: 6.00%. Found: C: 80.00%; H: 6.56%; N: 6.08%.

Provenance & Evidence