Unsubstituted porphycene was prepared in 65% yield from 2,7,12,17-tetra-tert-butylporphycene. Taking into account the yield of the substrate, this represents more than a five-fold improvement compared to the methodology used to date. Enhanced availability of the parent porphycene may be exploited in synthetic procedures based on derivatization of the unsubstituted compound.
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Urbańska et al. (2007) studied this question.
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