4-benzoyl-5-phenyl-1,3-oxathiol-2-one. Synthesis and reaction with N-nucleophiles

The synthesis of 4-benzoyl-5-phenyl-1,3-oxathiol-2-ones 1 and the behaviour of 1a against several amines were investigated to afford aminomercaptoethenes 2 or thiocarbamates 3 , as well as complete cleavage to sulfur, dibenzoylmethane and the corresponding urea, depending on the nature of the N-nucleophile used.