Answers are grounded in this paper and cite their sources.
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.
No takes yet. Share an insight, caveat, or question.
Benoiton et al. (1981) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: