Abstract: | 2-(Het)aryl derivatives of 2'-aminospiro(1,3-dioxane)-5,5'-thiazolin]-4'-one or spiro(1,3-dioxane)-5,5'-thiazolidine]-2',4'-dione are formed by the acid catalyzed interaction of 2-amino-5,5-bis(hydroxymethyl)-4-thiazolinone or its oxo analog 5,5-bis(hydroxymethyl)thiazolidine-2,4-dione with (hetero)aromatic aldehydes. |