Metal template reactions. XX. Macrocyclic metal complexes derived from 4,6-Dimethoxy-3-methylindole-2,7-dicarbaldehyde and some primary diamines with additional nitrogen donor atoms

Abstract

4,6-Dimethoxy-3-methylindole-2,7-dicarbaldehyde (6) has been prepared by the formylation of 4,6-dimethoxy-3-methylindole (5)itself prepared by the hydride reduction of the oxoindole (4). Macrocyclic nickel(II) and copper(II) complexes (8), (10) and (12) have been prepared from the dialdehyde (6), the appropriate metal(II) acetate and the primary diamines 2,2'-iminobisaniline (7), 2-amino-N-(2'-aminophenyl)benzamide (9) and 2-amino-N-(2'-aminobenzoyl)benzamide (11) respectively.