Metal ion controlled ring contraction to produce an oxazolidine-containing Schiff base macrocycle and the X-ray structure of the Pb(NCS)2 complex

Abstract

The reaction of 2,6-diacetylpyridine with 1,3-diamino-2-hydroxypropane in methanol in the presence of lead(II) cations leads to the isolation of lead(II) complexes of an oxazolidine-containing Schiff base macrocycle formed by ring-contraction; the ligand is hexadentate and the lead is N-bonded to one thiocyanate to form a monocationic complex.