PHOTOCHEMICAL TRANSFORMATION OF TRITHIO-BARBITURATE INTO THIOHYDANTOIN AND IMIDAZOLINO-THIOPHENE DERIVATIVES~1

摘要

Upon ittadiation of trithiobarbiturate (1),ring contraction reaction occurred to give thiohydantoin (2 or 3) and imidazolinothiophene (4) derivatives.Further,on treating with iodine,the thiohydantoins (2 and 3) undergo ring colsure,giving imidaZolinothiophene derivatives (4).