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A new general route toward the synthesis of diphenylglycoluril clips with two different side walls starting from the new precursor 6b and the known compound 2b is described. A variety of clips are accessible in this way, some of them containing metal binding ligand systems, viz. phenanthroline, pyridine, salophen, and porphyrin for future applications as supramolecular catalysts. The physical and binding properties of the new clips are presented and discussed.
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Reek et al. (1997) studied this question.
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