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Newcomers: meso-Arylamino- and meso-alkylaminosubporphyrins have been synthesized by the Pd-catalyzed aminations of meso-bromosubporphyrin 1 as the first example of subporphyrins containing heteroatom substituents at the meso-position. The X-ray structural analyses have revealed significant structural distortions of meso-aminosubporphyrins 2 due to the effective electronic interaction (see scheme).
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Kitano et al. (2012) studied this question.
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