Fig. 9. (A) Change in CD spectra of R-7 with two enantiomers of 8 in 80% hexane/CHCl3, [R-7] = 1/2[8] = 5.0 × 10−5 M. (B) Structure of chiral reagents 8–16. (C) CD intensity difference of R-7 aroused by two enantiomers of testing chiral reagents at intensity max wavelength in 80% hexane/CHCl3. (D) Change in max CD intensity of R-7 with ee% of R-8 ([R-7] = 1/2[8] = 4.0 × 10−5 M) and R-13 ([R-7] = 1/2[13] = 5.0 × 10−5 M).
