A-confused porphyrin

It is noteworthy to mention that employment of silver(i) trifluoroacetate in place of silver(i) acetate, as in the case of A-confused porphyrin, did not give the desired products. This has been attributed to the better basicity of the acetate anion than the trifluoroacetate, which aided the deprotonation of the three interior GH/NH protons at the carbaporphyrin ligand. Besides, it has been noticed that an excessive amount of silver acetate was required for the synthesis. The mechanism of the silver insertion reaction for this type of ligands was proposed, according to what Bruckner had proposed for the synthesis of silver(m) w -triarylcorroles.218,236 The reaction was suggested to occur via a disproportionation reaction, with the supportive observation of silver deposit formation after the reaction.237... 

The unnatural porphyrin family still fascinates the imagination. This year, to give a flavor for the diversity, there has appeared hybrid calixphyrins <00OL3103>, doubly A-confused porphyrins , unsymmetrical porphyrins attached to a modified 5,10,15,20-tetra (4-(2-trimethylsilylethynyl)phenyl]-21-23-dithiaporphyrin <00TL3709>,... 

An A-confused porphyrin undergoes cycloplatination upon reaction with PtCl2 to form complex 522, whose Pt center is bonded to one porphyrin via a metallacycle and to the other porphyrin via a Pt-N single bond." Two nickelaporphyrins having a methyl group at the carbon bonded to Ni coordinate to the Pt center of 523 with a Pt-N <7-bond and 6, A-chelation. ... 

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