反应详情

20 g of 5,5-diphenylhydantoin (0.08 moles) and 80 ml (32 g) of formalin are introduced into a suitable reaction vessel containing 720 ml of water and one g of potassium carbonate. The reaction is stirred at room temperature for 24 hours, after which the subject compound, mp 186.5°-188.5° C., yield 22.58 g (91.86%) is obtained by filtration.

1. customafter which the subject compound, mp 186.5°-188.5° C., yield 22.58 g (91.86%) is obtained by filtration