Further insight into aryl nitration of tetraphenylporphyrin

We report an in-depth study on meso-aryl nitration of tetraphenylporphyrin. In contrast to previous studies, new evidence reveals that tetrakis( p-nitrophenyl) derivative can be obtained as a major product. Successful isolation of the barely soluble product toward a remarkable yield of nearly 90% ha...

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Veröffentlicht in:Tetrahedron 2011-08, Vol.67 (33), p.6030-6035
Hauptverfasser: Xue, Zhi, Lee, Priscilla P.S., Wang, Yanming, Kwong, Daniel W.J., Li, Jing, Xin, John H., Wong, Wai-Kwok, Cheuk, Kevin K.L.
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Sprache:eng
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Zusammenfassung:We report an in-depth study on meso-aryl nitration of tetraphenylporphyrin. In contrast to previous studies, new evidence reveals that tetrakis( p-nitrophenyl) derivative can be obtained as a major product. Successful isolation of the barely soluble product toward a remarkable yield of nearly 90% has been reached by means of a solid phase extraction technique. Distribution of different nitro-porphyrin components is reassessed with respect to varying acid content in the reactions. An ortho-effect model is proposed to describe the formation mechanism. [Display omitted]
ISSN:0040-4020
1464-5416
DOI:10.1016/j.tet.2011.06.031