Synthesis of (+)-2R,3R,11R,12R- and (?)-2S,3S,11S,12S-tetraphenyl-18-crown-6 |
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Authors: | F Dietl A Merz R Tomahogh |
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Institution: | Institut fuer Organische Chemie der Universitaet Universitaetsstrasse 31, D-8400 Regensburg, FRG |
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Abstract: | The synthesis of the title crown ethers starting from optically active hydrobenzoins is described. R(+)-1,in CDCl3 ,preferentially extracts R(+)-phenylglycine methyl ester hydroperchlorate from an aqueous solution of the racemate with a chiral recognition factor of 1.5 as shown by nmr measurements. |
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