Metals in the synthesis of macrocycles. Part I. Metal complexes of 2,6-bis-(1-iminoisoindolin-3-ylideneamino)pyridine as templates

Structural analogs of tetrapyrrole macrocycles and their biological properties

“…For example, the syn thesis of 1 : 1 complexes of 2,6 bis(3 iminoisoindolin 1 ylideneamino)pyridine with Cu, Ni, Co, and Au was docu mented. 35 At the same time, copper complexes of BIA based on phenylene 1,3 diamine, 3,5 diamino 1,2,4 triazole, and 2,6 diamino 4 chloro 1,3,5 triazine have the composition 2 : 1. 36 In addition, the synthesis of 1 : 1 metal complexes 28a,b was documented (see Scheme 7).…”

Environmentally Benign Route for Scalable Preparation of 1-Imino-3-thioisoindolines−The Key Building Blocks for the Synthesis of Dithio- and Diamino-β-isoindigo Derivatives

“…As a result, only a very limited number of papers were published since its discovery up to date. − The diimino-substituted (X = NH) β-isoindigo molecule IV was found to be a valuable derivative , for the preparation of organic pigments suitable for coloring high or low molecular mass materials, plastics, natural resins, and cellulose derivatives . This class of chromophores was also used in the preparation of expanded or contracted phthalocyanine-type macrocycles. Again, diimino-substituted (X = NH) β-isoindigo derivatives IV are not easily accessible molecules since their synthesis requires either the use of high pressure (∼26 atm), high temperature (∼130 °C), and long reaction time (∼10 h), or utilizes high boiling point (>180 °C) and toxic thiols as solvents .…”

Cationic BPI‐Gold(III) Complexes: Controlling Ligating and Nonligating Anions

“…A focus of our research in recent years has been the coordination chemistry of the monoanionic bis(2‐pyridylimino)isoindole (BPI) ligand family 11,12. Gold(III) complexes of the related 1,3,5‐triazapentadiene and phthalocyanine frameworks are well known (Figure 2),10,13 and we assumed that the related BPI framework would provide an equally suitable binding site for the ligation of gold(III) 14. Moreover, BPI ligands have previously proven to be resilient towards oxidative, reductive, and acidic conditions, making them the ideal benchmark system 15…”