85891-96-9Relevant articles and documents
SYNTHESIS OF (+)-2R,3R,11R,12R- AND (-)-2S,3S,11S,12S-TETRAPHENYL-18-CROWN-6
Dietl, F.,Merz, A.,Tomahogh, R.
, p. 5255 - 5258 (1982)
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.