Synthesis and properties of 5-methylidene-3,5-dihydro-4H-imidazol-4-ones (microreview)

This microreview presents the key methods of synthesis of 5-methylidene-3,5-dihydro-4H-imidazol-4-ones together with analysis of the relative efficiency for the substituent introduction at different positions of the ring. Also, examples of reactions typical for these compounds presented in the literature over the last seven years are given.