Imidazolidinone
Imidazolidinones are a class of 5-membered ring heterocycles structurally related to imidazolidine. Imidazolidinones feature a saturated C3N2 nucleus, except for the presence of a urea or amide functional group in the 2 or 4 positions.
2-Imidazolidinones
The 2-imidazolidinones are cyclic derivatives of urea. 1,3-Dimethyl-2-imidazolidinone is a polar solvent and Lewis base. Drugs featuring this ring system include emicerfont, imidapril, and azlocillin. Dimethylol ethylene urea is the reagent used in permanent press clothing. 2-Imidazolidinone is used as a formaldehyde scavenger in amino-resin systems and textile finishes.4-Imidazolidinones
4-Imidazolidinones can be prepared from phenylalanine in two chemical steps :Imidazolidinone catalyst work by forming an iminium ion with carbonyl groups of α,β-unsaturated aldehydes and enones in a rapid chemical equilibrium. This iminium activation lowers the substrate's LUMO. Several 4-imidazolidinones have been investigated.
Drugs featuring the 4-imidazolidinone ring include hetacillin, NNC 63-0532, spiperone, and spiroxatrine.