화학공학소재연구정보센터
Catalysis Letters, Vol.112, No.1-2, 27-30, 2006
Highly enantioselective hydrogenation of alpha-Alkyl-beta-arylpropenoic acids over cinchonidine-modified palladium catalyst
Enantioselective hydrogenation of (E)- alpha-alkyl-beta-arylpropenoic acids was studied over the cinchonidine-modified Pd/C under the conditions optimized for (E)-alpha,beta-diarylpropenoic acids. Enantiomeric excess (ee) of the product was increased by adjusting the alpha-alkyl group as a properly bulky isopropyl. The ee was as high as 80% when the beta-group is phenyl, and reached 86% with p-anisyl group. Stereoselection of those substrates is similar to that of (E)-alpha,beta-diarylpropenoic acids.