An Improved Synthesis of Hydroxy Aryl Ketones by Fries Rearrangement with Methanesulfonic Acid/Methanesulfonic Anhydride
作者:Ingyu Jeon、Ian Mangion
DOI:10.1055/s-0032-1316568
日期:2012.8
Methanesulfonic acid treated with methanesulfonic anhydride effectively mediates the Fries rearrangement of aryl esters to give hydroxy aryl ketones with high yields.
Abstract Large-scale enantioselective synthesis of the chiral amine unit of HCVNS5Ainhibitor Elbasvir has been accomplished in six steps, with 55% overall yield. The process includes a highly enantioselective reduction of the NH imine using R-(+)-diphenylprolinol with NaBH4. This target chiral synthesis requires simple starting materials and inexpensive catalysts.
[EN] PROCESS FOR PREPARING TETRACYCLIC HETEROCYCLE COMPOUNDS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS HÉTÉROCYCLIQUES TÉTRACYCLIQUES
申请人:MERCK SHARP & DOHME
公开号:WO2015065821A1
公开(公告)日:2015-05-07
The present invention is directed to a process for preparing Tetracyclic Heterocycle Compounds of formula (I): which are useful as HCV NS5A inhibitors. The present invention is also directed to compounds that are useful as synthetic intermediates for making the compounds of formula (I).
PROCESS FOR PREPARING SUBSTITUTED INDOLE COMPOUNDS
申请人:DIROCCO Daniel A.
公开号:US20170334926A1
公开(公告)日:2017-11-23
The present invention is directed to a process for preparing Substituted Indole Compounds of Formula (I): wherein R
1
, R
2
, R
3
and R
4
are as defined herein. These indole compounds are useful as synthetic intermediates for making inhibitors of HCV NS5A.
[EN] DEUTERIUM-MODIFIED ELBASVIR DERIVATIVE, DRUG COMPOSITION CONTAINING SAME, AND USE THEREOF<br/>[FR] DÉRIVÉ D'ELBASVIR MODIFIÉ PAR DU DEUTÉRIUM, COMPOSITION DE MÉDICAMENT LE CONTENANT ET SON UTILISATION<br/>[ZH] 氘修饰的elbasvir衍生物、含有该化合物的药物组合物及其用途