D-N-Acetyl amino acid esters were obtained via enantioselective hydrolysis of their racemates by use of fermenting yeast. Evidence is given that proteinases are the enzymes involved.
Well-Defined Binuclear Chiral Spiro Copper Catalysts for Enantioselective N–H Insertion
作者:Shou-Fei Zhu、Bin Xu、Guo-Peng Wang、Qi-Lin Zhou
DOI:10.1021/ja2084493
日期:2012.1.11
An asymmetric N-H insertion of α-diazoesters with anilines catalyzed by well-defined copper complexes of chiral spiro bisoxazoline ligands was studied in detail. The copper-catalyzed asymmetric N-H insertion of a wide range of α-alkyl-α-diazoacetates with anilines was accomplished with excellent enantioselectivity (up to 98% ee) and provided an efficient method for the preparation of optically active