Cyclic disulfide macrocycles were rapidly synthesized cleanly and selectively from rigid dithiols via oxidation with iodine when activated by pnictogen additives (As and Sb). Macrocycles were confirmed by 1H-NMR spectroscopy and X-ray crystallography. A p-xylyl-based disulfide trimer and tetramer crystallized in hollow, stacked columns stabilized by intermolecular, sulfur⋯sulfur close contacts.
当通过pnictogen添加剂(As和Sb)活化后,通过
碘氧化,可以从刚性二
硫醇中快速、选择性地合成出环状二
硫键大环。大环通过1H-NMR光谱和X射线晶体学得到证实。以
对二甲苯为基的二
硫键三聚体和四聚体结晶为中空堆叠柱状,通过分子间
硫……
硫的紧密接触而稳定。