METHOD OF SEPARATING ISOMERS OF A CROWN ETHER COMPOUND TO RECOVER CIS-SYN-CIS ISOMER FROM DICYCLOHEXYL 18-CROWN 6.

摘要

A method for separating the isomers of a crown ether compound and making it possible to recover in particular the pure cis-syn-cis isomer from DCH 18C6 includes: a) dissolving in an organic solvent a mixture of the isomers of said crown compound including the cis-anti-cis isomer and the cis-syn-cis isomer, b) adding uranyl nitrate to the solution obtained in stage a) in sufficient quantities so that virtually all of the isomers, except the cis-syn-cis isomer, are precipitated in the form of complexes with the uranyl nitrate, c) separating the formed precipitate, d) recovering the cis-syn-cis isomer from the solution, and e) recovering the cis-anti-cis isomer from the precipitate.