Elucidation of the constitution of a heterocyclic rearrangement product by means of17O-NMR-spectroscopy

摘要

In the course of an attempted elimination reaction starting from an isothiochromane derivative substituted with an amino-alcohol moiety, a benzocthiophene derivative formed via a rearrangement reaction was isolated unexpectedly. Its constitution was confirmed unambiguously via17O-NMR-spectroscopy.