[EN] PROCESS FOR THE PREPARATION OF ( S ) - 3 - CYANO - 5 - METHYLHEXANOIC ACID DERIVATIVES ADN OF PREGABALIN [FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS D'ACIDE (S)-3-CYANO-5-MÉTHYLHEXANOÏQUE ET DE PRÉGABALINE
[EN] PROCESS FOR THE PREPARATION OF ( S ) - 3 - CYANO - 5 - METHYLHEXANOIC ACID DERIVATIVES ADN OF PREGABALIN [FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS D'ACIDE (S)-3-CYANO-5-MÉTHYLHEXANOÏQUE ET DE PRÉGABALINE
Electroreductive Carbofunctionalization of Alkenes with Alkyl Bromides via a Radical-Polar Crossover Mechanism
作者:Wen Zhang、Song Lin
DOI:10.1021/jacs.0c08532
日期:2020.12.9
variety of alkene functionalization reactions, most of which proceed via an anodic oxidation pathway. In this report, we further expand the scope of electrochemistry to the reductive functionalization of alkenes. In particular, the strategic choice of reagents and reaction conditions enabled a radical-polar crossover pathway wherein two distinct electrophiles can be added across an alkene in a highly
Provided herein are compounds, such as a compound of Formula (I), as described herein, or a pharmaceutically acceptable salt thereof, that are immunoproteasome (such as LMP2 and LMP7) inhibitors. The compounds described herein can be useful for the treatment of diseases treatable by inhibition of immunoproteasomes. Also provided herein are pharmaceutical compositions containing such compounds and processes for preparing such compounds.
Organic Fluorine Compounds. III. Action of Perchloryl Fluoride on Substituted Ethyl Cyanoacetates and Animal Toxicities of the Fluorinated Products<sup>1-3</sup>
作者:Herman. Gershon、Stephen G. Schulman、A. David. Spevack
DOI:10.1021/jm00316a008
日期:1967.7
Evaluation of Several Routes to Advanced Pregabalin Intermediates: Synthesis and Enantioselective Enzymatic Reduction Using Ene-Reductases
This publication describes the evaluation of four synthetic routes to the advanced pregabalin (Lyrica) intermediate 7. Asymmetric reduction of (E)-7 with an ene-reductase (OPR1 from Lycopersicon esculentum) gave a saturated cyanoester intermediate 5 with the desired S stereocenter in >99% ee. OPR1 also catalyzed the reduction of (Z)-7 to (S)-5, but with lower conversion and selectivity.
Rationalisation of the stereochemical outcome of ene-reductase-mediated bioreduction of α,β-difunctionalised alkenes
作者:Elisabetta Brenna、Michele Crotti、Francesco G. Gatti、Alessia Manfredi、Daniela Monti、Fabio Parmeggiani、Andrea Pugliese、Davila Zampieri
DOI:10.1016/j.molcatb.2013.12.020
日期:2014.3
The OYE1-3-mediated reductions of some alpha,beta-difunctionalised alkenes, showing on the double bond a nitrile and ester group, are submitted to a careful stereochemical analysis, in order to identify which of the two electron-withdrawing groups (EWGs) is responsible for the activation of the C=C double bond towards reduction and for establishing hydrogen bond interactions within the binding pocket of the enzymes. The results show that for most of these substrates the activating EWG is the CN moiety linked to the prostereogenic olefinic carbon atom. The final stereochemical outcome can be explained through the empirical model which has been recently developed for difunctionalised alkenes activated by carbonyl/carboxyl containing EWGs.In a single case the activation is due to the COOR group linked to the less substituted olefinic carbon atom: an alternative empirical model is established for this kind of substrates, taking into consideration the OYE-catalysed reductions of beta,beta'-disubstituted-a-monofunctionalised alkenes. (C) 2014 Elsevier B.V. All rights reserved.