Synthesis and enantiomer recognition of crown ethers containing the cis-4b,5,6,10b,11,12-hexahydrochrysene and the cis-4b,5,9b,10-tetrahydroindeno[2,1-a]-indene subunit as the chiral centre
Abstract
The absolute configurations of the diols (–)-(1) and (+)-(4) of C2 symmetry have been established and the enantiomer recognition behaviour of the novel optically active crown ethers (–)-(3) and (+)-(6) prepared from (–)-(1) and (+)-(4), respectively, has been examined.