Sn(IV) Porphyrins as NMR Shift Reagents and Supramolecular Protecting Groups: Preparation of a Carboxylate-Catenane Porphyrin Complex

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• 作者：Yin Tong ; Darren G. Hamilton ; Jean-Christophe Meillon ; and Jeremy K. M. Sanders
• 刊名：Organic Letters
• 出版年：1999
• 出版时间：November 4, 1999
• 年：1999
• 卷：1
• 期：9
• 页码：1343 - 1346
• 全文大小：53K
• 年卷期：v.1,no.9(November 4, 1999)
• ISSN：1523-7052

文摘

Coordination of a carboxylic acid diaryl crown ether to a Sn(IV) porphyrin promotes its ability to act as a template for the formation of a[2]catenane: in the absence of the porphyrin the acid-crown yields only a tiny amount of the interlocked derivative. Once isolated the freeacid-[2]catenane presents extremely broad resonances in its 500 MHz ¹H NMR spectrum, but complexation to a Sn(IV) porphyrin results indramatic resolution via a combination of dynamic and dispersive effects.

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