Asymmetric Reduction of Chiral Pyruvamide with Sodium Borohydride
作者:Toratane Munegumi、Kaoru Harada
DOI:10.1246/bcsj.56.298
日期:1983.1
alcohols and N-[(R)-lactoyl]-(S)-amines were obtained in excess. When the reductions were carried out in methanol or ethanol in the presence of metallic salt, N-[(S)-lactoyl]-(S)-amines were obtained in asymmetric yields up to 22%.
Asymmetric Catalytic Hydrogenations of Chiral α-Keto Amides
作者:Kaoru Harada、Toratane Munegumi
DOI:10.1246/bcsj.57.3203
日期:1984.11
Asymmetric catalytic hydrogenations of chiralpyruvamides were carried out using palladium on charcoal (Pd-C) as a catalyst to give lactamides with the diastereoisomeric purities (d.p.) of up to 62%. It was found that there was a linear correlation between the d.p. and the dielectric constant of the solvents used in the hydrogenations of chiralpyruvamides. The results were explained by employing the