Chiral (α‐substituted) β‐hydroxy amides are interesting derivatives as they are useful buildingblocks of many biologically active compounds. Herein, the biocatalytic stereocontrolled synthesis of various acyclic syn‐α‐alkyl‐β‐hydroxy amides through a dynamic kinetic resolution is shown. Hence, a series of overexpressed alcohol dehydrogenases (ADHs) in Escherichia coli was used to reduce the corresponding
Oxygen‐Involved Oxidative Deacetylation of α‐Substituted β‐Acetyl Amides – Synthesis of α‐Keto Amides
作者:Dianjun Li、Wei Yu
DOI:10.1002/adsc.201300660
日期:2013.12.16
Abstractα‐Substituted β‐acetyl amides could undergo CC bond cleavage to form α‐keto amides when treated with copper(II) chloride (CuCl2) and boron trifluoride diethyl etherate (BF3⋅OEt2) under an oxygen atmosphere. The yield can be increased by the addition of tert‐butyl hydroperoxide which alone can also effect the reaction. The reaction provides a new protocol for the synthesis of α‐keto amides.magnified image