Three different electrochemical methods have been applied for the synthesis of chiral building blocks for diastereoselective amidoalkylation reactions. These are A. the direct anodic α-methoxylation of amides and carbamates; B. anodic methoxylative decarboxylation of α-amino acid derivatives (Hofer-Moest reaction) C. indirect NaCl mediated anodic α-methoxylation of α-amino acid derivatives. The application of these building blocks for the synthesis of enantiomerically pure α-amino acids, dichiral 1,2-amino alcohols and chiral 1,3-diamines is described.
Oxazolidinone Synthesis through Halohydrin Dehalogenase- Catalyzed Dynamic Kinetic Resolution
作者:Ana Mikleušević、Zdenko Hameršak、Branka Salopek-Sondi、Lixia Tang、Dick B. Janssen、Maja Majerić Elenkov
DOI:10.1002/adsc.201500111
日期:2015.5.26
An efficient dynamickineticresolution protocol using a single enzyme is described. Both the kineticresolution and substrate racemization are catalyzed by halohydrin dehalogenase from Agrobacterium radiobacter AD1 (HheC). The HheC‐catalyzed reaction of epibromohydrin and 2‐bromomethyl‐2‐methyloxirane with sodium cyanate afforded 5‐substituted 2‐oxazolidinones in high yields (97% and 87%) and high