摘要:
5,12-Dioxocyclams and bis-dioxocyclams were capped across the 1,8-secondary amino groups with 2,6-bis(bromomethyl)pyridine to give pyridine-capped mono- and bis-dioxocyclams. The copper(II) complex of capped monocyclam 5b was prepared and characterized by X-ray crystallography. Treatment of dioxocyclams with 2,3,5,6-tetrakis(bromomethyl)pyrazine produced bis-cyclams connected through the ir secondary amino groups through the 2,3- and 5,6-positions of the pyrazine.