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Regioselective Amination of Carbaporpholactone and N-Confused Porphyrin

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posted on 2009-11-20, 00:00 authored by Norbert Grzegorzek, Miłosz Pawlicki, Lechosław Latos-Grażyński
An efficient route to the direct amination at the inner carbon of carbaporpholactone is reported. A regioselectivity of substitution is enforced by activation of the embedded furanone fragment due to coordination of the highly oxidized silver(III) cation. A stepwise oxidation of the dimethylamine derivative leads to the internally bridged carbaporpholactones which contain respectively [5.7.5] tricyclic or [5.7.5.7.5] pentacyclic rings. The analogous reactivity of N-confused porhyrin has been also explored.

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