PROCESS FOR SYNTHESIS OF SYN AZIDO EPOXIDE AND ITS USE AS INTERMEDIATE FOR THE SYNTHESIS OF AMPRENAVIR & SAQUINAVIR
申请人:Council of Scientific & Industrial Research
公开号:US20150011782A1
公开(公告)日:2015-01-08
Disclosed herein is a novel route of synthesis of syn azide epoxide of formula 5, which is used as a common intermediate for asymmetric synthesis of HIV protease inhibitors such as Amprenavir, Fosamprenavir, Saquinavir and formal synthesis of Darunavir and Palinavir obtained by Cobalt-catalyzed hydrolytic kinetic resolution of racemic anti-(2SR,3SR)-3-azido-4-phenyl-1,2-epoxybutane (azido-epoxide).
Disclosed herein are improved methods for the synthesis of honokiol, as well as methods for the synthesis of 3,3′-di-tert-butyl-5,5′-dimethyl-[1,1′-biphenyl]-2,4′-diol, 3′,5-dimethyl-[1,1′-biphenyl]-2,4′-diol, and 2,4′-dimethoxy-3′,5-dimethyl-1,1′-biphenyl, 3,3′,5,5′-tetra-tert-butyl-[1,1′-biphenyl]-2,4′-diol, and certain tetrasubstituted bisphenols, and uses therefor.
Oxidative carbonylation of monohydroxy aryl compounds by methyl formate
申请人:Bayer MaterialScience AG
公开号:EP2781503A1
公开(公告)日:2014-09-24
The field of the present invention relates to a process for continuously preparing alkylaryl carbonates and diarylcarbonates from methyl formate and at least one monohydroxy aryl compound in the presence of catalysts, and to the use thereof for preparation of polycarbonates.
[EN] COMPOSITES, METHODS AND USES THEREOF<br/>[FR] COMPOSITES, PROCÉDÉS ET UTILISATIONS ASSOCIÉS
申请人:NAT UNIV SINGAPORE
公开号:WO2021107872A1
公开(公告)日:2021-06-03
The present invention relates, in general terms, to methods of catalysing a reaction, including the steps of contacting a chemical entity comprising a sulphide moiety with a composite and an oxidant. The composite acts as a heterogeneous catalyst to oxidise the sulphide moiety. The present invention also relates to composites, methods of synthesising the composites and its use as a catalyst thereof.