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Treatment of 5-arylidene-2-methylmercaptohydantoins (1a-d) and 5-arylazo-2-methyl- mercaptohydantoins (3a, b) with glycine in acetic acid gave 5-arylidene-N 2 -carboxy- methylglycocyamidines (2a-d) and 5-arylazo-N 2 -carboxymethylglycocyamidines (4a, b) respectively. 2 a, b, d were cyclised with acetic anhydride to give imidazoimidazoline derivatives (5a-c). 2-Methylmercapto-3-phenylhydantoin (7) reacted with anthranilic acid to give 9 which previously prepared by the action of aniline on ethyl 2-methylthio-4-oxo- 3,4-dihydro-3-quinazolinylacetate (8). Arylidenes 1 a-c, 10 a-c and arylazo derivatives 3 a, b reacted with anthranilic acid to give imidazoquinazoline derivatives 11a-f and 12 a, b, respectively.

Reactions of Amino Acids on 2-Methylmercaptohydantoin Derivatives. Synthesis of Imidazoimidazoline and Imidazoquinazoline Derivatives