Novel compounds and methods for synthesis and therapy
申请人:——
公开号:US20040053999A1
公开(公告)日:2004-03-18
Novel compounds are described. The compounds generally comprise an acidic group, a basic group, a substituted amino or N-acyl and a group having an optionally hydroxylated alkane moiety. Pharmaceutical compositions comprising the inhibitors of the invention are also described. Methods of inhibiting neuraminidase in samples suspected of containing neuraminidase are also described. Antigenic materials, polymers, antibodies, conjugates of the compounds of the invention with labels, and assay methods for detecting neuraminidase activity are also described.
Reagent-dictated site selectivity in intermolecular aliphatic C–H functionalizations using nitrogen-centered radicals
作者:Anthony M. Carestia、Davide Ravelli、Erik J. Alexanian
DOI:10.1039/c8sc01756e
日期:——
The site selectivities of intermolecular, aliphatic C–H bond functionalizations are central to the value of these transformations. While the scope of these reactions continues to expand, the site selectivities remain largely dictated by the inherent reactivity of the substrate C–H bonds. Herein, we introduce reagent-dictated site selectivity to intermolecularaliphatic C–H functionalizations using
Base-catalyzed selective esterification of alcohols with unactivated esters
作者:Chunyan Zhang、Guoying Zhang、Shizhong Luo、Chunfu Wang、Huiping Li
DOI:10.1039/c8ob02411a
日期:——
A practical and efficient base-catalyzed esterification has been developed for the facile synthesis of a broad range of esters from simple alcohols with unactivated tert-butyl esters. This protocol could be conducted at mild conditions, providing esters in high to excellent yields with good functional tolerance. Mechanistic studies provided evidence of an exchange of the tert-butyl alkoxide metal with
[EN] PROCESS FOR THE PREPARATION OF ACYLATED SECONDARY ALCOHOL ALKOXYLATES AND SECONDARY ALCOHOL ALKOXYLATES<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ALCOXYLATES D'ALCOOLS SECONDAIRES ACYLÉS ET ALCOXYLATES D'ALCOOLS SECONDAIRES
申请人:SHELL INT RESEARCH
公开号:WO2010049465A1
公开(公告)日:2010-05-06
A process for the preparation of acylated secondary alcohol alkoxylates, said process comprising : (i) reaction of one or more internal olefins with one or more carboxylic acids in the presence of a catalyst composition in order to form one or more carboxylic acid esters; (ii) reaction of one or more carboxylic acid esters from step (i) with one or more alkylene oxide reactants, in the presence of a catalytically effective amount of a catalyst composition comprising: (a) one or more alkaline earth metal salts of carboxylic and/or hydroxycarboxylic acids and/or hydrates of the former; (b) an oxy-acid selected from sulphuric acid and ortho-phosphoric acid; (c) an alcohol and/or an ester; and/or products of the reciprocal reactions of (a), (b) and/or (c) in order to form one or more acylated secondary alcohol alkoxylates; and optionally (iii) hydrolysis or transesterification of one or more acylated secondary alcohol alkoxylates from step (ii) in order to form one or more secondary alcohol alkoxylates; and a process for making secondary alcohol alkoxy sulphates comprising the steps of: preparing secondary alcohol alkoxylates by the afore-mentioned process; and sulphating the secondary alcohol alkoxylates.