An unexpected involvement of ethyl-2-cyano-2-(hydroxyimino) acetate cleaved product in the promotion of the synthesis of nitriles from aldoximes: a mechanistic perception
摘要:
While attempting to synthesize nitriles from aldoximes using O-sulfonate esters of oxyma [ethyl 2-cyano-2-(hydroxyimino)acetate], an unexpected involvement of oxyma cleaved product in promoting the synthesis of nitriles was observed. Such involvement of the oxyma cleaved product in the reaction mechanism, together with the usual anticipated pathway improved drastically the applicability of the method by reducing the time needed for the reaction to be completed over that of the sulfonyl chlorides. Other advantages of the present protocol are excellent yields in ambient and milder conditions. (C) 2013 Elsevier Ltd. All rights reserved.
N-Heterocyclic carbene catalyzed synthesis of oxime esters
作者:Dieter Enders、André Grossmann、David Van Craen
DOI:10.1039/c2ob26974k
日期:——
A triazolium salt derived N-heterocyclic carbene catalyzes the redox esterification reaction between α–β-unsaturated aldehydes and oximes. The resulting saturated oxime esters were obtained in very good yields for a broad range of aliphatic, aromatic and heteroaromatic substrates.
[EN] PROCESS FOR PREPARATION OF OPTICALLY ACTIVE 1-ERYTHRO-2-AMINO-1-PHENYL-1-PROPANOL<br/>[FR] PROCEDE POUR PREPARER DU 1-ERYTHRO-2-AMINO-1-PHENYL-1-PROPANOL ACTIF DE MANIERE OPTIQUE
申请人:EMMELLEN BIOTECH PHARMACEUTICA
公开号:WO2005100299A1
公开(公告)日:2005-10-27
An efficient cost-effective process for preparation of l-erythro-2-amino-1-phenyl-1-propanol from l-1-phenyl-1-hydroxy-2-propanone, which comprises converting l-1-phenyl-1-hydroxy-2-propanone to l-1-phenyl-1-hydroxy-2-propanone oxime and reducing the oxime with a catalyst consisting of finely divided nickel and aluminium metals giving good diastereomeric purity and yield.
[EN] NOVEL PROCESS FOR THE PREPARATION OF R-PHENYLACETYLCARBINOL AND β-AMINOALCOHOLS<br/>[FR] NOUVEAU PROCÉDÉ DE PRÉPARATION DE R-PHÉNYLACÉTYLCARBINOL ET DE β-AMINOALCOOLS
申请人:MALLADI DRUGS AND PHARMACEUTICALS LTD
公开号:WO2020129087A1
公开(公告)日:2020-06-25
Disclosed herein is a process for the manufacture of (R)-phenylacetylcarbinol ((R)-PAC), (1R,2S). Ephedrine and its salts, (1R,2S)-norephedrine and its salts and 1-(Phenyl/Substituted phenyl)-2-(amino/alkylamino/dialklyamino) propan-1-ol and its salts, by enzymatic reduction of α-isonitrosopropiophenone (INP) and substituted α-isonitrosopropiophenone (substituted INP). The β-amino alcohols, produced by the process of present invention gives their corresponding diastereomers on Walden inversion. The present preparation process of (R)-PAC with (R)-PAC oxime as an intermediate has the advantage, that propiophenone as a key raw material which is easily available and has a low-price, operationally simple with high yield and a single process leading to the synthesis of several 1,2-aminoalcohol/ β- aminoalcohols active pharmaceutical ingredients. The design approach of the process is to reduce environmental impact of the product by comparing to the present manufacturing process.
[EN] METHODS AND COMPOSITIONS FOR TREATMENT OF ISCHEMIC CONDITIONS AND CONDITIONS RELATED TO MITOCHONDRIAL FUNCTION<br/>[FR] PROCÉDÉS ET COMPOSITIONS POUR LE TRAITEMENT D'ÉTATS ISCHÉMIQUES ET D'ÉTATS ASSOCIÉS À UNE FONCTION MITOCHONDRIALE
申请人:CARDERO THERAPEUTICS INC
公开号:WO2010121232A1
公开(公告)日:2010-10-21
The present invention relates to compositions and methods for prophylactic and/or therapeutic treatment of conditions related to mitochondrial function. In various aspects, the present invention comprises administering one or more compounds selected from the group consisting of epicatechin, an epicatechin derivative, catechin, a catechin derivative, nicorandil, and a nicorandil derivative in an amount effective to stimulate mitochondrial function in cells. The methods and compositions described herein provide for reducing infarct size in the heart following permanent ischemia or ischemia /reperfusion (IR) event or method for delaying, attenuating or preventing adverse cardiac remodeling, and can assist in prevention of impaired mitochondria biogenesis and thus prevention of the consequences of impaired mitochondrial biogenesis in various diseases and conditions, as well as provide for the active therapy of mitochondrial depletion that may have already occurred.
Cumarin-Verbindungen und ihre Verwendung als Aufheller für organische hochmolekulare Materialien
申请人:BAYER AG
公开号:EP0005172A1
公开(公告)日:1979-11-14
Zum Weißtönen von synthetischen Fasermaterialien, nsbesondere Polyestermaterialien, eignen sich vorzüglich Verbindungen der Formel
in der
R, und R2 = Wasserstoff, Alkyl, Aralkyl oder Aryl, (jedoch nicht gleichzeitig Wasserstoff)
X = Cyan- oder Estergruppe ist.
Die erzielten Aufhellungen sind wasch- und lichtecht. Man erhält die Verbindungen I z. B. durch Kondensation entsprechender Triazolylsalicylaldehyde mit Cyanessigestern oder Malonestern.
用于增白合成纤维材料,尤其是聚酯材料,其化合物的化学式为
中的
R,和 R2 = 氢、烷基、芳烷基或芳基(但不能同时为氢)
X = 氰基或酯基。
得到的增白剂具有耐洗和耐光性。化合物 I 可通过相应的三唑水杨醛与氰基乙酸酯或丙二酸酯缩合得到。