Organometallic reactions characteristic of chiral heterocyclic compounds: Synthesis and stereoselective grignard reaction of chiral 4-Oxa-7,7a-diazaperhydroindans.
Enantioselective Synthesis of 2-Substituted Pyrrolidines from 4-Hydroxynitriles. Application to the Synthesis of the Dopamine Agonist rs-59022
摘要:
Two novel routes to optically active 4-hydroxynitriles and the subsequent cyclization to 2-substituted pyrrolidines are described. The methodology is applied to the synthesis of the key intermediate used in the synthesis of the dopamine agonist RS-59022. Unusual selectivity in the CBS reduction of 4-oxonitriles is explained through structural and mechanistic analysis.
[EN] GREENER AND ECONOMIC PROCESS FOR PREPARATION OF PREGABALIN<br/>[FR] PROCÉDÉ ÉCOLOGIQUE ET ÉCONOMIQUE POUR LA PRÉPARATION DE PRÉGABALINE
申请人:HIKAL LTD
公开号:WO2020183376A1
公开(公告)日:2020-09-17
The present invention relates to an economical, enzyme catalyzed and commercially viable greener process for manufacturing Pregabalin of formula (I) in high yield with highchemical and chiral purity.
The present invention is related to a compound of formula (I)
or a pharmaceutically acceptable salt or ester thereof. The present invention is further related to a method of healing and/or inhibiting formation of scar tissue in an external wound of a subject comprising topically administering to the external wound of the subject an effective amount of a compositing containing a compound that binds FK506 binding protein 4.
Expanding the Chemical Diversity in Artificial Imine Reductases Based on the Biotin-Streptavidin Technology
作者:Tommaso Quinto、Fabian Schwizer、Jeremy M. Zimbron、Albert Morina、Valentin Köhler、Thomas R. Ward
DOI:10.1002/cctc.201300825
日期:2014.4
We report on the optimization of an artificialiminereductase based on the biotin‐streptavidin technology. With the aim of rapidly generating chemical diversity, a novel strategy for the formation and evaluation of biotinylated complexes is disclosed. Tethering the biotin‐anchor to the Cp* moiety leaves three free coordination sites on a d6 metal for the introduction of chemical diversity by coordination
A rapid and general method for the asymmetric synthesis of 2-substituted pyrrolidines using tert-butanesulfinamide
作者:Kristin M. Brinner、Jonathan A. Ellman
DOI:10.1039/b502080h
日期:——
A new method for the asymmetricsynthesis of 2-substituted pyrrolidines in three steps from commercially available starting materials is described. Addition of the Grignard reagent prepared from 2-(2-bromoethyl)-1,3-dioxane to N-tert-butanesulfinyl aldimines proceeds in high yields and with good diastereoselectivities. The sulfinamide products are then cleanly converted into pyrrolidines in one step
[EN] PROCESS FOR THE PREPARATION OF CHIRAL PYROLLIDINE-2-YL- METHANOL DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS CHIRAUX DE PYROLLIDINE-2-YL-MÉTHANOL
申请人:HOFFMANN LA ROCHE
公开号:WO2018153820A1
公开(公告)日:2018-08-30
The invention relates to a novel process for the preparation of a chiral pyrollidine-2-yl-methanol derivative or a salt thereof of the formula (I), wherein R1 is aryl or heteroaryl and both aryl or heteroaryl are optionally substituted by C1-4-alkyl, halo-C1-4-alkyl, C1-4-alkoxy or halogen. The synthesis proceeds through an intermediate Weinreb amide, which is reacted with a Grignard reagent and hydrogenated. The chiral pyrollidine-2-yl-methanol derivatives of the formula (I) are versatile building blocks in the synthesis of pharmacologically active compounds, such as for the stereospecific synthesis of oligonucleotides carrying chiral phosphonate moieties.