Reaction of N-t-butoxycarbonylamino acid anhydrides with tertiary amines and carbodi-imides. New precursors for 2-t-butoxyoxazol-5(4H)-one and N-acylureas
Abstract
N-t-Butoxycarbonylamino acid anhydrides react with tertiary amines to give 2-t-butoxyoxazol-5(4H)-ones, and with N,N′-dialkylcarbodi-imides to give the oxazol-5(4H)-ones and the N-acyl-N,N′-dialkylureas.