Masaaki Iwata

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.

Bifunctionalization of α,ω-sulphonamides via kinetically controlled reaction of α,ω-bis(N-nitrososulphonamides)

α,ω-Bis(N-nitrososulphonamides) in hot benzene were converted into α,ω-disulphonates and bifunctional α-sulophonate-ω-sulphonamides, in good yields, by Intramolecular N-nitrososulphonamide–sulphonate rearrangement.