A reliable method for the one-step direct deoxygenation of alpha-hydroxy ketones has been developed using a silyl lithium reagent and acetic anhydride. The method is metal-catalyst-free and does not require prefunctionalization of the hydroxy group prior to its removal. Deoxygenation of different ...
公开/公告日期: 1991-02-19 申请(专利权)人: BP CHEM INTERNATL LTD 发明人: BP Gureishii 摘要: PURPOSE: To produce corresponding alcohols in a high selectivity by hydrogenating α-hydroxy ketones, especially dihydroxy acetone, in a liquid phase in the presence of a carboxylic acid.收藏...
PRODUCTION OF ALPHA HYDROXY KETONES VIA CARBENE CA 专利名称：PRODUCTION OF ALPHA HYDROXY KETONES VIA CARBENE CATALYZED POLE REVERSAL REACTION OF ALDEHYDES 发明人：JACKSTELL, RALF,JOVEL, IRINA,BELLER,MATTHIAS,HATELEY, MARTIN,WECKBECKER,CHRISTOPH,HUTHMACHER, KLAUS 申请号：EP07787858.5 申请日：20070724 ...
There is a need for cheap and simple methods to destroy recalcitrant pollutants such as dyes in waste water. It is shown that the radicals produced from the UV A and B photolysis of alpha-hydroxy ketones are capable of completely bleaching a wide range of azo dyes (Orange II, Amaranth, Ev...
运输条件冰袋运输 产品介绍 应用 制备光学活性 α-羟基羧酸、α-羟基醛、α-羟基酮以及 2-氨基醇的有效中间体。 Description Useful intermediate in the preparation of optically active α-hydroxy carboxylic acids, α-hydroxy aldehydes, α-hydroxy ketones, and 2-amino alcohols. ...
Usage It is a useful intermediate in the preparation of optically active α-hydroxyl carboxylic acids, α-hydroxyl aldehydes, α-hydroxy ketones, and 2-amino alcohols.11. Toltal 21 Suppliers View more Hebei Yanxi Chemical Co.,Ltd 1YR Tel: Update Time:2024/12/12 inquire Dayang Chem (...
The rates of acid-catalyzed hydrolysis of diethyl ketal and 2,2-disubstituted 1,3-dioxolane derivatives of both aromatic and aliphatic ketones have been measured in 50% dioxane-water (v/v) at 30°. The 1,3-dioxolane derivatives of acetop... TH Fife,L Hagopian - 《Journal of Organic Chemi...
Electron-transfer reactions of aromatic alpha,beta-epoxy ketones: Factors that govern selective... Examines the electron-transfer reactions of aromatic alpha,beta-epoxy ketones as factors that govern the selective conversion to beta-diketones and beta-hy... Hasegawa,Eietsu,Ishiyama,... - 《Journal...
US 2006/0148042 relates to a biotransfounation process for the preparation of chiral aromatic alpha-hydroxy ketones using acetohydroxyacid synthase (AHAS) or tartronate semialdehyde synthase (TSAS). This document is totally silent regarding the synthesis of non aromatic synthesis of chiral acetohydro...
The new method involves a tandem alpha-hydroxyalkylation/beta-chlorination of alpha,beta-acetylenic ketones by using TiCl4 as the chlorine source for alpha,beta-conjugate addition, and concurrently as the Lewis acid promoter for the carbonyl addition. The new system tolerates a b...