Photochemical Transformation of Trithiobarbiturate into Thiohydantoin and Imidazolinothiophene Derivatives
摘要:
Upon irradiation 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 closure, giving imidazolinothiophene derivatives (4).
Photochemistyr of the Nitrogen-Thiocarbonyl Systems. 28. Photoreactions of Thiobarbiturates. Intermolecular Cycloaddition with Alkenes and Ring Contraction Reaction of Trithiobarbiturate.