B(C6F5)3-catalyzed metal-free hydrogenation of 2-oxazolones

A metal-free hydrogenation of 2-oxazolones was successfully realized by using 10 mol% of B(C6F5)3 as the catalyst, giving a variety of 2-oxazolidinones in 70-98% yields. An enamine to imine process was believed to be involved in this reaction.