“…The substrates hydrogenated over Pt catalysts were MP [10], but most of all EP [11, 14, 16-18, 21, 24, 27] and KPL [12,13,15,19,26,27]; hydrogenations over Pd were performed on 4-methoxy-6-methyl-2-pyrone [25], a-phenylcinnamic acid [23] and isoforon [22], and those over Rh on KPL [26] as substrate. One component of the chiral modifiers used was a parent cinchona alkaloid (CD, CN, QN, QD), whereas the other component was the opposite enantiomer of CD, CN, QN, QD or their C9-O-R derivatives [12,13,16,18,19,24,[26][27][28]. In addition to cinchona alkaloids and their derivatives, other chiral modifiers including synthetic chiral compounds and achiral modifiers were also investigated [11,15,20,22].…”