| Abstract: | The action of ammonium acetate on 5-arylidene-3-phenyl-2-methylmercaptohydantoins 1g,h in acetic acid led to the formation of the 5-arylidene-3-phenylhydantoin derivatives 4a,b . In absence of a solvent, ring opening and rearrangement took place with the formation of the 5-arylidene-N2-phenylglycocyamidine derivatives 7a-c . Compounds 7a-c reacted with methyl iodide to afford the corresponding 3-methyl derivatives 9a-c . The structures of the synthesised products were established and the mechanism proposed for the rearrangement reaction was discussed. |
