A Novel and Convenient Route to Phosphono-Oligopeptides Derived from 1,3-Oxazolines, 1,3-Oxazines and 1,3-Thiazolines

Abstract
An efficient and simple method is described based on the Ugi -four component condensation (4CC) reaction for the synthesis of unnatural phosphonooligopepides derived from 1,3-oxazolines, 1,3-thiazolines and 1,3-oxazines.