alcohols to produce the corresponding chiral amines that are important structural motifs in numerous biologically active entities. By the use of an iridium/phosphoric acid cooperative catalytic system, a range of easily accessible alcohol substrates, as a mixture of four stereoisomers, can be converted in a convergent fashion to the valuable α-branched chiral amines with good to high diastereo- and enantioselectivity
Synthesis of Robalzotan, Ebalzotan, and Rotigotine Precursors via the Stereoselective Multienzymatic Cascade Reduction of α,β-Unsaturated Aldehydes
作者:Elisabetta Brenna、Francesco G. Gatti、Luciana Malpezzi、Daniela Monti、Fabio Parmeggiani、Alessandro Sacchetti
DOI:10.1021/jo4003097
日期:2013.5.17
The key step is based on a multienzymatic reduction of an α,β-unsaturated aldehyde or ketone to give the saturated primary or secondary alcohol, in a high yield and with a high ee. The catalytic system consists of the combination of an ene-reductase (ER; i.e., OYE2 or OYE3 belonging to the Old Yellow Enzyme family) with an alcohol dehydrogenase (ADH), applying the in situ substrate feeding product removal