Abstract

AbstractNew “unsymmetrical”, sucrose‐based diaza‐crown ethers have been designed and prepared from monosilylated hexa‐O‐benzylsucrose derivatives. The enantioselective complexation of phenylethylammonium cations by these receptors was evaluated. It was demonstrated that the introduction of the amino group at the 6‐position (glucose moiety) in sucrose increases the association constant for the S cation, but reduces the enantioselectivity. On the other hand, introduction of the amino group at the 6′‐position (fructose moiety) in sucrose increases significantly the value of Ka and at the same time the high enantioselectivity is preserved.

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