First Comprehensive Bakkane Approach: Stereoselective and Efficient Dichloroketene-Based Total Syntheses of (±)- and (−)-9-Acetoxyfukinanolide, (±)- and (+)-Bakkenolide A, (−)-Bakkenolides III, B, C, H, L, V, and X, (±)- and (−)-Homogynolide A, (±)-Homogynolide B, and (±)-Palmosalide C
作者:Timothy J. Brocksom、Fernando Coelho、Jean-Pierre Deprés、Andrew E. Greene、Marco E. Freire de Lima、Olivier Hamelin、Benoît Hartmann、Alice M. Kanazawa、Yanyun Wang
DOI:10.1021/ja0208456
日期:2002.12.1
dichloroketene with dimethylcyclohexenes has been used as the key reaction in an efficient, general approach to the bakkanes. New methods and methodologies that have been developed in this work include spiro beta-methylene-gamma-butyrolactonizations, a vicinal dicarboxylation, an angelic esterpreparation, a transesterification, an epoxy ketone double reduction, and a retro aldol-aldol approach to low-energy aldol
[EN] INTEGRATED METHOD AND APPARATUS FOR THE PRODUCTION OF ARYL CARBONATES<br/>[FR] PROCÉDÉ ET APPAREIL INTÉGRÉS POUR LA PRODUCTION DE CARBONATES D'ARYLE
申请人:SABIC GLOBAL TECHNOLOGIES BV
公开号:WO2016151487A1
公开(公告)日:2016-09-29
In an embodiment, a method for producing an alkyl aryl carbonate, comprises producing a dialkyl carbonate azeotrope stream comprising a dialkyl carbonate and an unreacted alkanol; purifying the dialkyl carbonate azeotrope stream in a dialkyl carbonate purification section comprising a distillation column and a pervaporation unit to provide a first purified dialkyl carbonate stream and a first purified alkanol stream; reacting the first purified dialkyl carbonate stream and an aromatic alcohol in the presence of a second transesterification catalyst in an alkyl aryl carbonate reactor to produce an alkanol product stream comprising an alkanol product and an unreacted dialkyl carbonate, and an alkyl aryl carbonate product stream comprising the alkyl aryl carbonate and an unreacted aromatic alcohol; and purifying the alkanol product stream in the dialkyl carbonate purification section.
A Ring Contraction Strategy toward a Diastereoselective Total Synthesis of (+)-Bakkenolide A
作者:Vânia M. T. Carneiro、Helena M. C. Ferraz、Tiago O. Vieira、Eloisa E. Ishikawa、Luiz F. Silva
DOI:10.1021/jo100108b
日期:2010.5.7
presented from the readily available optically active Wieland−Miescher ketone. This novel synthesis of this sesquiterpene lactone features the following as key stereoselective transformations: (i) the ring contraction reaction of a octalone mediated by thallium(III) nitrate (TTN); (ii) a hydrogenation to create the cis-fused junction; and (iii) the formation of the C7 quaternary center through an enolate intermediate
[DE] VERFAHREN ZUR HERSTELLUNG OPTISCH AKTIVER CARBONYLVERBINDUNGEN<br/>[EN] METHOD FOR PRODUCING OPTICALLY ACTIVE CARBONYL COMPOUNDS<br/>[FR] PROCEDE POUR PRODUIRE DES COMPOSES CARBONYLE A ACTIVITE OPTIQUE
申请人:BASF AG
公开号:WO2005085160A1
公开(公告)日:2005-09-15
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung optisch aktiver Aldehyde oder Ketone mit 3 bis 25 Kohlenstoffatomen, die mindestens ein racemisierbares Stereozentrum aufweisen, durch katalytische Dehydrierung der entsprechenden optisch aktiven primären oder sekundären Alkohole in Gegenwart eines Katalysators in der Gasphase.
New Pyridinone Derivatives as Potent HIV-1 Nonnucleoside Reverse Transcriptase Inhibitors
作者:Kiet Le Van、Christine Cauvin、Stéphane de Walque、Benoît Georges、Sandro Boland、Valérie Martinelli、Dominique Demonté、François Durant、László Hevesi、Carine Van Lint
DOI:10.1021/jm801438e
日期:2009.6.25
Several 5-ethyl-6-methyl-4-cycloalkyloxy-pyridin-2(1H)-ones were synthesized and evaluated for their anti HIV-1 activities against wild-type virus and clinically relevant mutant strains. A racemic mixture (10) with methyl substituents at positions 3 and 5 of the cyclohexyloxy moiety had potent antiviral activity against wild-type HIV-1. Subsequent stereoselective synthesis of a stereoisomer displaying