Amine dehydrogenases: efficient biocatalysts for the reductive amination of carbonyl compounds
作者:Tanja Knaus、Wesley Böhmer、Francesco G. Mutti
DOI:10.1039/c6gc01987k
日期:——
Amines constitute the major targets for the production of a plethora of chemical compounds that have applications in the pharmaceutical, agrochemical and bulk chemical industries. However, the asymmetric synthesis of...
Direct condensation of β‐arylketones with acetamide afforded both Z and E enamides. The Z‐configured substrates underwent hydrogenation with excellent enantioselectivity by using the Rh/tangphos catalytic system (see scheme; tangphos=1,1′‐di‐tert‐butyl‐[2,2′]‐diphospholanyl). The product β‐arylisopropylamines are important precursors to several drugs.
Asymmetric Biocatalytic Amination of Ketones at the Expense of NH<sub>3</sub> and Molecular Hydrogen
作者:Anja K. Holzer、Katharina Hiebler、Francesco G. Mutti、Robert C. Simon、Lars Lauterbach、Oliver Lenz、Wolfgang Kroutil
DOI:10.1021/acs.orglett.5b01154
日期:2015.5.15
A biocatalytic system is presented for the stereoselective amination of ketones at the expense of NH3 and molecular hydrogen. By using a NAD(+)-reducing hydrogenase, an alanine dehydrogenase, and a suitable omega-transaminase, the R- as well as the S-enantiomer of various amines could be prepared with up to >99% ee and 98% conversion.
Enantioselective hydrogenation of (Z)- and (E)-β-arylenamides catalyzed by rhodium complexes of monodentate chiral spiro phosphorous ligands: a new access to chiral β-arylisopropylamines
A highly enantioselective rhodium-catalyzedhydrogenation of both (Z)- and (E)-β-arylenamides was developed by using monodentate chiral spiro phosphite and phosphine ligands, respectively. The hydrogenation reaction provides an efficient access to optically active β-arylisopropylamines, important building blocks for the synthesis of biologically active compounds.