Fifty-Two Membered Macromonocyclic Polyamine Possessing Twelve Nitrogen Atoms in the Ring: Cyclic Spermine Tetramer

Abstract
By the reaction of 1, 4-dibromobutane with forty-eight membered acyclic polyamine in the presence of cesium carbonate in DMF, cyclic spermine (or thermospermine) tetramer was prepared in 72% yield.
Keywords