Unexpected Intramolecular Cyclization of a Tetraaza Macrocyclic Nickel(II) Complex Bearing Two N-Alkynyl Pendant Arms

摘要

The reaction of amines with alkynes, which is commonly known as hydroamination, has attracted considerable attention because it can be a useful organic transformation to form biologically important unsaturated heterocycles.1"8 A large number of studies have examined the hydroamination. To the best of our knowledge, however, there are no reports on intramolecular hydroamination involving alkynyl groups attached to a tetraaza macrocyclic compound.