Reaction procedures for Beckmann rearrangement and cyclization can be
improved substantially if carried out under micellar/microemulsion con
ditions. This mode of operation allows the use of dilute acids as agai
nst the conventional highly acidic medium with ease of product recover
y and yield. Experimental results for a case example Of D-(-)-N-carbam
oyl phenyl glycine to phenyl hydantoin are presented and analysed.