Kinetic analysis of the asymmetric hydrogenation of (<i>E</i>)-2,3-diphenylpropenoic acid over cinchonidine derivative-modified Pd/C: quinoline ring modification
quinoline ring modification of cinchonidine (CD) on the enantioselectivity of the asymmetric hydrogenation of (E)-2,3-diphenylpropenoic acidover chirally modified Pd/C were systematically analyzed from the kinetic points of view. The substitutions at the 2′- and/or 6′-positions of the quinoline ring of CD by a methyl, vinyl, n-butyl, or phenyl group decreased enantioselectivityover the whole range of the