Quinazolin-2-ones having a spirohydantoin ring. I. Synthesis of spiro(1,2,3,4-tetrahydroquinazoline-4,4'-imidazolidine)-2,2',5'-trione by reaction of 1-carbamoylisatin with urea or guanidine.
Quinazolin-2-ones having a spirohydantoin ring. I. Synthesis of spiro(1,2,3,4-tetrahydroquinazoline-4,4'-imidazolidine)-2,2',5'-trione by reaction of 1-carbamoylisatin with urea or guanidine.