METHOD FOR PRODUCING 5-HYDROXYMETHYLFURFURAL IN THE PRESENCE OF A LEWIS ACID CATALYST AND/OR A HETEROGENEOUS BASE CATALYST AND A HOMOGENEOUS ORGANIC BRØNSTED ACID CATALYST IN THE PRESENCE OF AT LEAST ONE APROTIC POLAR SOLVENT
申请人:IFP Energies Nouvelles
公开号:US20190092740A1
公开(公告)日:2019-03-28
The invention relates to a process for the production of 5-hydroxymethylfurfural from a feedstock comprising at least one sugar using a combination of at least one catalyst selected from the homogeneous Lewis acids, the heterogeneous Lewis acids and the heterogeneous bases and at least one homogeneous Brønsted acid catalyst selected from the families of the thioureas, the sulphonic acids and the phosphorus-containing organic compounds, alone or in a mixture, in the presence of at least one aprotic polar solvent, at a temperature comprised between 30° C. and 300° C., and at a pressure comprised between 0.1 MPa and 10 MPa.
Synthesis of new thioxanthenes by organocatalytic intramolecular Friedel–Crafts reaction
作者:Tülay Yildiz
DOI:10.1080/00397911.2018.1482351
日期:2018.9.2
alcohols (1a–1v) using the intramolecular Friedel–Crafts reaction. The starting materials were obtained in two stages via a coupling reaction followed by the Grignard reaction. In this study, we tried for the first time to use some organic Brønsted acids as organocatalysts (3a–3h) in the intramolecular Friedel–Crafts cyclization reaction of thioether alcohols. The synthesis of original substituted thioxanthenes
[EN] PROCESS FOR PREPARING DIASTEREOMERICALLY ENRICHED PHOSPHORAMIDATE DERIVATIVES OF NUCLEOSIDE COMPOUNDS FOR TREATMENT OF VIRAL INFECTIONS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS DE PHOSPHORAMIDATES ENRICHIS EN DIASTÉRÉO-ISOMÈRES DE COMPOSÉS DE NUCLÉOSIDES, DESTINÉS AU TRAITEMENT D'INFECTIONS VIRALES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2014008236A1
公开(公告)日:2014-01-09
The present invention is directed to a process for preparing diastereomerically enriched nucleoside phosphoramidates having the formula I:
[EN] STEREOSELECTIVE MANUFACTURE OF SELECTED PURINE PHOSPHORAMIDATES<br/>[FR] PRODUCTION STÉRÉOSÉLECTIVE DE PHOSPHORAMIDATES DE PURINE SÉLECTIONNÉS
申请人:ATEA PHARMACEUTICALS INC
公开号:WO2022040473A1
公开(公告)日:2022-02-24
The present invention provides stereoselective processes of manufacture for the phosphoramidate nucleotide Compound 1 or a pharmaceutically acceptable salt thereof.