What is "oxazolidine"

n. (context organic compound English) A saturated heterocycle containing three carbon atoms and one nitrogen and one oxygen atom; any of its derivatives

An' oxazolidine' is a five-membered ring compound consisting of three carbons, a nitrogen, and an oxygen. The oxygen and NH are the 1 and 3 positions, respectively. In oxazolidine derivatives, there is always a carbon between the oxygen and the nitrogen (or it would be an isoxazolidine). All of the carbons in oxazolidines are reduced (compare to oxazole and oxazoline). Some of their derivatives, the oxazolidinediones, are used as anticonvulsants.

Oxazolidines have been around for over 100 years.