ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 31, Number 1
JKCSEZ 31(1)
February 20, 1987 

In a converting reaction of p-bromo-α-diethylaminoacetophenone (1a) and p-bromo-α-piperidinoacetophenone (1b) with KCN and (NH4)2CO3, to hydantoin, the expected 5-(p-bromophenyl)-5-diethylaminomethylhydantion (2a) and 5-(p-bromophenyl)-5-piperidinomethylhydantoin (2b) were not formed. Diethylaminomethyl group and piperidinomethyl group were eliminated and p,p'-dibromodiphenylhydantil (4), which might be formed through dimerization of 5-(bromophenyl)-hydantoin (3), and p-bromobenzoic acid (5), which was formed through a degradation of 5-(bromophenyl)-hydantoin, were obtained. In the case of p-bromo-α-morpholinoacetophenone (1c), the expected 5-(p-bromophenyl)-5-morpholinomethylhydantoin (2c) was formed.