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Metoprolol synthesis

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    Metoprolol synthesis


    Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. buy cialis shanghai Изобретение относится к 4-метоксиалкил-2-трет.-бутилфенолы (1) (алкил = этил-, пропил-), которые получают обработкой 4-хлоралкил-2,6-ди-трет.-бутилфенолов метилатом натрия (или раствором гидроокиси натрия в метаноле) при нагревании с последующим термолизом образующихся 4-метоксиалкил-2,6-ди-трет. Описываемые соединения 1 использованы в найденных условиях для получения 4-(-метоксиалкил) фенолов формулы: C. Затем в комплексе с винной кислотой готовят тартрат метопролола, который является действующим началом лекарственной формы. Ранее метопролол (Vа) получали по схеме 2, согласно которой фенол (II) синтезировали из нитропроизводного (VI) [1] Восстановление VI водородом приводит к амину (VII). Известное промежуточное нитросоединение (VI) производят по двум различным схемам. Реализован метод получения его из 2-фенилэтанола [1] который метилировали диметилсульфатом и полученный метиловый эфир 2-фенилэтанола нитровали, получая нитропродукт VI с выходом 55% К недостаткам этой схемы следует отнести невысокий выход целевого продукта VI, а также трудности, связанные с выделением п-изомера из смеси образующихся о-, м- и п-изомеров. Preparation of 2-methoxyethenyl-nitrobenzenes// Hallberg A. Известен другой подход к синтезу нитропродукта VI взаимодействием 4-бромнитробензола и метилвинилового эфира с последующим восстановлением водородом продукта конденсации [2,4,5] Процесс осуществляют по схеме: Основным недостатком схемы является отсутствие в России производств обоих компонентов, причем синтез метилвинилового эфира технологически опасен [6] Кроме того, наличие стадии бромирования требует регенерации брома, а стадия нитрования тщательной очистки от изомеров. В рассмотренных примерах синтеза метопролола потери продуктов, связанные с введением гидроксильной группы в ароматический фрагмент промежуточных соединений, достигают 75% согласно которой 4-( -хлоралкил)-2,6-ди-трет.-бутилфенолы (IX), полученные из 2,6-ди-трет.

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    Metoprolol', Synthetic Communications, 20 22, 3489 — 3496. To link to this Article DOI 10.1080/00397919008051592. URL. clomid capsules Metoprolol, marketed under the tradename Lopressor among others, is a medication of the selective β1 receptor blocker type. It is used to treat high blood pressure. Retrosynthetic analysis is a technique for solving problems in the planning of organic syntheses. This is achieved by transforming a target molecule into simpler precursor structures without assumptions regarding starting materials.

    Author: Ji De Hua Tutor: Yao Jun School: Hebei University of Science and Technology Course: Medicinal Chemistry Keywords: (S) - carteolol (S) - metoprolol (R) - epichlorohydrin 1,3 - cyclohexanedione Dihydroxyphenylethanol Methoxy ethyl phenol CLC: R914 Type: Master's thesis Year: 2009 Downloads: 254 Quote: 0 Read: Download Dissertation Card atenolol and metoprolol are two important beta-adrenergic blockers, clinically significant long-acting antihypertensive effect and slow down the heart rate, or the treatment of primary carteolol the drug of choice of open-angle glaucoma and ocular hypertension, metoprolol is the drug of choice for the world in recent years the treatment of hypertension. Card atenolol and metoprolol are optically active compounds, there is a pair of enantiomers, the current clinical administered in the form of a racemic, research shows that in the literature, (S) - card atenolol and (S) - metoprolol has a higher activity and better and smaller toxic side effects, has a lot of value for development. 1,3 - cyclohexanedione, the papers for the raw materials, the aminolysis of ammonium acetate, acrylic ring closure, NBS dehydrogenation three steps to get 5 - hydroxy -3,4 - dihydro -2 (1H) - quinolone total yield rate of 71%. Study amination reagents, mild reaction conditions become, and select the dehydrogenation reaction solvent, so that the the dehydrogenation reaction yield from 68% to 83%. And 5 - hydroxy-3 ,4 - dihydro -2 (1H) - quinolone the intermediate raw synthesis of β-adrenergic receptor blockers card atenolol. We optimize the reaction conditions carteolol, is more appropriate reaction conditions. Thesis in synthetic racemic carteolol basis, to the intermediate 5 - hydroxy-3 ,4 - dihydro -2 (1H) - quinolone as raw materials, ether-forming reaction with the (R) - epichlorohydrin generating the chiral intermediate (S) -5 - (2,3 - epoxy) propoxy-3 ,4 - dihydrotestosterone quinolone, and then the reaction with t-butylamine to obtain (S) - carteolol. Retrosynthetic analysis is a technique for solving problems in the planning of organic syntheses. This is achieved by transforming a target molecule into simpler precursor structures without assumptions regarding starting materials. Each precursor material is examined using the same method. Corey formalized this concept in his book The Logic of Chemical Synthesis. This procedure is repeated until simple or commercially available structures are reached. The power of retrosynthetic analysis becomes evident in the design of a synthesis. The goal of retrosynthetic analysis is structural simplification. Often, a synthesis will have more than one possible synthetic route. Retrosynthesis is well suited for discovering different synthetic routes and comparing them in a logical and straightforward fashion.

    Metoprolol synthesis

    PRODUCT MONOGRAPH - Laboratoire Riva inc., Metoprolol - Wikipedia

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  5. Numerous efficient synthetic methodologies have been elaborated for the synthesis of βsynthetic approaches attempted towards the synthesis of β-blockers betaxolol, metoprolol, sotalol and timolol.

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    FileMetoprolol From Wikimedia Commons, the free media repository. DescriptionMetoprolol English A synthetic scheme for the production of metoprolol. cialis 20mg generic Chemical aspects of metoprolol metabolism. Asymmetric synthesis and absolute configuration of the 3-4-1-hydroxy-2-methoxyethylphenoxy-1-isopropylamino-2-propanols, the diastereomeric benzylic hydroxylation metabolites The synthesis method according to claim 1, wherein the molar ratio of step 3 with metoprolol succinate is 1 0.5-0.8; 2 of the organic solvent is methanol, ethanol, isopropanol, acetic acid, ethyl ether, acetone, 1,4-dioxane, tetrahydrofuran, DMF, dichloromethane, or chloroform.

     
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