A tin(IV)-ruthenium(II)-tin(IV) cyclic porphyrin trimer with replaceable chiral linings |
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Authors: | Webb S J Sanders J K |
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Affiliation: | Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K. S.J.Webb@sheffield.ac.uk |
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Abstract: | A series of cyclic metalloporphyrin trimers, Ru(CO)(py)[Sn(carboxylate)2](2)2, having cavities lined with different carboxylate groups are synthesized by adding the appropriate carboxylic acids to the mixed trimer Ru(CO)(py)-[Sn(OH)2](2)2. This methodology provides ready access to a wide range of cavities lined with substituents possessing chirality or hydrogen-bonding groups. The potential of such systems is illustrated by synergistic binding of a hydroxypyridine to the Ru(II)-CO center and to the hydroxyl groups of a D-quinate-lined cavity. The effect of changing the carboxylate lining of the cavity on the course of epoxidation reactions catalyzed by these trimers is also reported. |
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