Stereoselective Synthesis of Piperidine-2,6-dicarboxylic Acids by Photocatalytic Reaction of Aqueous Cadmium(II) Sulfide Dispersion

Article abstract of DOI:10.1016/0040-4039(95)00509-B

Photoirradiation at wavelength > 300 nm onto a deareated aqueous suspension of cadmium(II) sulfide (CdS) particles in an aqueous solution of a mixture of stereo isomers of 2,6-diaminopimelic acid (DAP) produced piperidine-2,6-dicarboxylic acid (PDC).Both yield and trans/cis ratio of PDS markedly depend on the kind of CdS photocatalysts, its pre-treatment, and loading of fine platinum particles.A CdS photocatalyst prepared by heat-treatment at 1023 K in the presence of a small amount of air showed the highest yield and trans/cis ratio.