Abstract: Fourteen unreported 2 -amino-4H-imidazol-4-ones 4 were rapidly synthesized bYANew parallel synthetic method, which included aza-Wittig reaction of iminophosphorane₁with phenyLIsocynate to give carbodiimide 2 and subsequent reaction of 2 with various amines in a parallel fashion.The structure of compound 4 was confirmed by means of ¹HNMR, MSand IR.The configuration of compound 4b was determined as in Zform since the coupling constant ³J( ¹³C, ¹H) between the carbonyl carbon and the olefinic hydrogen was 5.6 Hz.

Key words: H-Imidazol-4-ones, Aza-Wittig reaction, Parallel synthesis