Synthesis and Structural Studies of N-Heterocyclic Schiff Bases of Allobetulamine

摘要

Triterpene Schiff bases 2–5 were prepared for the first time by reacting N-heterocyclic carbaldehydes with β-allobetulamine. Their structures were confirmed using 1H NMR and 13C NMR spectra and 2D experiments. The structure of 5 was also proved by an X-ray crystal structure analysis.