The bent conformation of a trisaccharide containing 2,4-diaminoxylopyranoside, in which both end sugars are presented in 1,3-diaxial orientation, is fixed by chelation of the diamino groups to Pt(II) and unfixed by a ligand exchange reaction with NaCN or thiourea giving its extended conformation.
含有2,4-二
氨基
吡喃糖的三糖的弯曲构象,其中两个末端糖以1,3-二轴取向呈现,通过将二
氨基基团与Pt(II)螯合来固定,并通过与NaCN或
硫脲的
配体交换反应来使其构象扩展。