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The continuous study toward the synthesis of meso-anchored sterically fixed tetrapyrrole chromophores has revealed that the bromination of (Z)-pyrromethenone derivative (Z)-1 to the corresponding meso-brominated product (E)-2 could not be reproduced anymore. Recent investigations by two of the authors (T.S. and Y.U.) confirm that the bromination reaction of (E)-1 or (Z)-1 by NBS selectively afforded (Z)-2, respectively, whose analytical data were identical with the data previously assigned not to (Z)-2 but (E)-2. The stereochemistry of the obtained meso-brominated pyrromethenone was unambiguously determined to be Z by X-ray crystallographic analysis of its single crystal. CCDC 1553479 ((Z)-2) contains the supplementary crystallographic data. Therefore, the reported data of (Z)-2 and (E)-2 in ref. 7 and ref. 8 were opposite each other, respectively. Furthermore, the stereochemistry of the product 3 by the substitution reaction of the obtained (Z)-2 with butylmagnesium bromide was also confirmed to be E, that is consistent with the reported assignment, by X-ray crystallographic analysis (CCDC 1553480). The other conclusions of our paper are not affected by this correction. A future publication will report a further study on the substitution reactions. Two of the authors (T.S. and Y.U.) thank Mr. Nobuhiko Ohashi for his experimental works on the present substitution reactions, and are also grateful to Dr. Yoko Sakata for X-ray crystallographic analysis of (Z)-2 and 3.

heterocycles

Correction to “Regioselective Introduction of Substituents to The Meso-Position of Pyrromethenone Derivative – Application to the Synthesis of Sterically Fixed Phytochrome Chromophore Anchored to the C15 Meso-Position”: Heterocycles, 2015, 90, 883: DOI: 10.3987/COM-14-S(K)97