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Separation of enantiomers using derivatisation method with chiral alcohols: a) EDCI, DMAP, CH2Cl2, 23 °C, 16 h, 54 %; b) EDCI, DMAP, CH2Cl2, 23 °C, 4 h, 31 %; c) DBU, toluene, 80 °C, 4 h; d) EDCI, DMAP, CH2Cl2, 23 °C, 16 h, 54 %; e) CuCl, MeOH, 40 °C, 6 h.
