Characterization of FabG and FabI of the<i>Streptomyces coelicolor</i>Dissociated Fatty Acid Synthase
作者:Renu Singh、Kevin A. Reynolds
DOI:10.1002/cbic.201402670
日期:2015.3.2
Functional crosstalk: β‐Ketoacyl‐acyl carrier protein (ACP; FabG) and enoyl‐ACP reductase (FabI) from Streptomyces coelicolor were identified and characterized. Kinetic analysis demonstrated that these enzymes process straight and branched‐chain substrates along with the ACPs from both fattyacid and undecylprodiginine biosynthetic pathways. This relaxed substrate specificity allow these enzymes to
An efficient synthesis of (E)-α,β-unsaturated ketones and esters with total stereoselectivity by using chromium dichloride
作者:José M. Concellón、Humberto Rodríguez-Solla、Carmen Méjica
DOI:10.1016/j.tet.2006.01.052
日期:2006.4
(E)-α,β-Unsaturatedketones 1 or esters 2 can be obtained with complete stereoselectivity by reaction of different 2-chloro-3-hydroxy ketones 3 or esters 4 and CrCl2. A comparative study of the results of synthesis of ketones 1 with CrCl2 or samarium is performed. A mechanism to explain both β-elimination reactions has been proposed.
A versatile and convenient protocol for the stereocontrolled synthesis of olefinic insect pheromones
作者:Andrei A. Vasil'ev、Alexei L. Vlasyuk、Galina D. Gamalevich、Edward P. Serebryakov
DOI:10.1016/0968-0896(96)00016-8
日期:1996.3
supplemented by an enzymatic hydrolysis, was successfully applied to the synthesis of configurationally pure (gp > or = 98%) pheromones of the furniture carpet beetle, dry bean beetle, rusty grain beetle, square-necked grain beetle and a trail-followingpheromone mimic for subterraneantermites.
[EN] PREPARATION OF AMINO ACIDS AND AMINO ACID DERIVATIVES<br/>[FR] PRÉPARATION D'ACIDES AMINÉS ET DE DÉRIVÉS D'ACIDES AMINÉS
申请人:MATERIA INC
公开号:WO2018057290A1
公开(公告)日:2018-03-29
The invention relates to a method for synthesizing amino acids or amino acid derivatives involving cross metathesis of functionalized olefins and a tandem amination-reduction process. Amino acids and amino acid derivatives present many interesting physical and chemical properties finding many uses in the automotive, fuel, electronic, and textile industries.
[EN] SULFONATED ORGANOPHOSPHINE COMPOUNDS AND USE THEREOF IN HYDROFORMYLATION PROCESSES<br/>[FR] COMPOSÉS D'ORGANOPHOSPHINE SULFONÉE ET LEUR UTILISATION DANS DES PROCÉDÉS D'HYDROFORMYLATION
申请人:DOW GLOBAL TECHNOLOGIES INC
公开号:WO2009091671A1
公开(公告)日:2009-07-23
A compound comprising a sulfonated triorganophosphine of formula R1R2PR3[SO3M)]n, wherein R1 and R2 are selected individually from alkyl, aralkyl, and alicyclic groups; wherein R3 represents a branched divalent or polyvalent, alkylene or alicyclic radical that is bonded to the phosphorus atom and to one or more sulfonate substituents, and further wherein R3 does not contain any aryl moieties; M represents a monovalent cation; and n is an integer representing a total number of sulfonated substituents. The compound is useful as a ligand in transition metal-ligand complex catalysts that are capable of catalyzing the hydroformylation of an olefinically-unsaturated compound with carbon monoxide and hydrogen to form one or more corresponding aldehyde products. The ligand is incapable of alkyl-aryl exchange, thereby leading to reduced ligand usage and improving ligand and transition metal, e.g., rhodium, recovery and recycling, as compared with prior art ligands.