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A diboronic acid-appended chiral ferrocene derivative (R)-9 was designed and synthesized. This chiral ferrocene scaffold was obtained by resolution of the diastereomer with a monosaccharide derivative. One can therefore expect that (R)-9 would show d/l selectivity for specific monosaccharides. The complex formation of (R)-9 with various saccharides using the two boronic acid functions was conveniently...
A calix[8]arene doubly-bridged at the 1,5-phenol units and 3,7-phenol units has a cage structure with D 2d symmetry. Regioselective introduction of methyl groups into the residual 2,4,6,8-phenol units affords five different cage compounds: that is, three racemic compounds, one meso compound, and one achiral compound. This paper reports systematic studies on the preparation methods of these...
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