{"id":4937,"date":"2021-12-27T13:30:08","date_gmt":"2021-12-27T13:30:08","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=4937"},"modified":"2026-04-28T10:41:54","modified_gmt":"2026-04-28T10:41:54","slug":"commonly-used-reagents-ethyl-vinyl-ether","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/de\/commonly-used-reagents-ethyl-vinyl-ether\/","title":{"rendered":"H\u00e4ufig verwendete Reagenzien - Ethyl-Vinyl-Ether"},"content":{"rendered":"<!-- lc-qa-start -->\n<p><strong>Schnelle Antwort:<\/strong> For paint and coating topics, formulators usually compare flow, substrate fit, surface quality, and durability together because the same adjustment can improve one property while weakening another.<\/p>\n<!-- lc-qa-end -->\n\n\n<p>\u3010Englischer Name\u3011Ethyl Vinyl Ether<\/p>\n\n\n\n<p>\u3010Molekulare Formel\u3011 C4H8O<\/p>\n\n\n\n<p>\u3010Molekulargewicht\u301172.11<\/p>\n\n\n\n<p>\u3010CAS Registrierungsnummer\u3011[109-92-2]<\/p>\n\n\n\n<p>\u3010Strukturformel\u3011CH3CH2OCH=CH2<\/p>\n\n\n\n<p>[Physikalische Eigenschaften] bp 33 oC, d 0,753 g\/cm3. Es ist in den meisten organischen L\u00f6sungsmitteln l\u00f6slich und kann in einer Vielzahl von organischen L\u00f6sungsmitteln verwendet werden.<\/p>\n\n\n\n<p>[Zubereitung und Ware] Dieses Reagenz wird in Unternehmen f\u00fcr chemische Reagenzien im In- und Ausland verkauft.<\/p>\n\n\n\n<p>[Vorsichtsma\u00dfnahmen] Dieses Reagenz ist eine leicht fl\u00fcchtige und entflammbare Chemikalie. Es wird empfohlen, es bei niedriger Temperatur und trocken zu lagern und in einem Abzug zu verwenden.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>Ethylvinylether wird haupts\u00e4chlich als Schutzgruppe f\u00fcr die Hydroxylgruppe und als Vinyl\u00fcbertragungsreagenz verwendet und ist an der Cyclisierungsadditionsreaktion in der organischen Synthese beteiligt.<\/p>\n\n\n\n<p>Unter den vielen Schutzgruppen f\u00fcr Hydroxygruppen ist der \u03b1-Ethoxyethylether (EE), der durch Ethylvinylether und Hydroxy gebildet wird, eine der am h\u00e4ufigsten verwendeten und am besten geeigneten Schutzgruppen. F\u00fcr die Reaktion ist in der Regel ein stark saurer Katalysator erforderlich. Zu diesem Zweck k\u00f6nnen TFA und TsOH verwendet werden, am h\u00e4ufigsten wird PPTS eingesetzt. Die Reaktion wird in der Regel durch mehrst\u00fcndiges R\u00fchren bei Raumtemperatur abgeschlossen. In den meisten F\u00e4llen liegt die Ausbeute des Produkts \u00fcber 95% (Formel 1) [1,2]. Die EE-Schutzgruppe kann die Entsch\u00fctzungsreaktion unter sauren Bedingungen leicht abschlie\u00dfen. PPTS-EtOH und w\u00e4ssriges HCl-MeOH sind empfohlene Methoden (Gleichung 2)<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.biochemsafebuy.com\/static\/kindeditor-4.1.10\/attached\/image\/20191127\/20191127095147_88752.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>Unter der Einwirkung des Quecksilberacetat-Derivats als Katalysator f\u00fchren Ethylvinylether und Hydroxyl eine Vinyl\u00fcbertragungsreaktion durch, bei der das entsprechende Vinyletherprodukt entsteht (Formel 3) [5]. Wird ein Metall-Palladium-Katalysator verwendet, kann die Verwendung eines Metall-Quecksilber-Katalysators vermieden werden (Gleichung 4) [6]. Diese Reaktion ist sinnvoller, da das Produkt weiteren Kondensationsreaktionen oder einer Olefinmetathese unterzogen werden kann [7,8].<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.biochemsafebuy.com\/static\/kindeditor-4.1.10\/attached\/image\/20191127\/20191127095200_82254.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>Ethylvinylether und Allylhydroxyl durchlaufen eine Vinyl\u00fcbertragungsreaktion, bei der das entsprechende Vinyletherprodukt entsteht. Die Reaktion wird in der Regel unter der Katalyse von Quecksilberacetat abgeschlossen. Durch Erhitzen des Produkts in Toluol oder Xylol kann die entsprechende Claisen-Umlagerung eingeleitet werden, wodurch die Reaktion von gro\u00dfem synthetischem Wert ist. Unter normalen Umst\u00e4nden kann der zweistufige Reaktionsprozess unter den Bedingungen des \"Ein-Topf-Kochens\" (Gleichung 5, Gleichung 6) abgeschlossen werden [9~11].<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.biochemsafebuy.com\/static\/kindeditor-4.1.10\/attached\/image\/20191127\/20191127095310_54634.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>In Gegenwart von Lewis-S\u00e4ure-Katalysatoren kann Ethylvinylether auch die entsprechende Cyclisierungsreaktion eingehen [12,13].<\/p>\n\n\n<!-- lc-commercial-start -->\n<h2>A practical checklist for coating formulation decisions<\/h2>\n<p>In conventional coating work, technical buyers usually move fastest when they define the film-performance target first and then review rheology, substrate compatibility, additives, and long-term durability as one system instead of isolated tweaks.<\/p>\n<ul>\n<li><strong>Start from the application scenario:<\/strong> furniture, powder coating, industrial paint, and waterborne systems often reward different formulation priorities.<\/li>\n<li><strong>Check surface quality and process stability together:<\/strong> leveling, wetting, foam control, and drying often interact strongly.<\/li>\n<li><strong>Review the film after full cure or drying:<\/strong> adhesion, hardness, weatherability, and color stability usually decide the commercial result.<\/li>\n<li><strong>Use targeted additive screening:<\/strong> wetting, leveling, defoaming, and wear-resistance additives work best when the defect is clearly defined.<\/li>\n<\/ul>\n<h3>Empfohlene Produktreferenzen<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/de\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/de\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/de\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/de\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<\/ul>\n<h3>H\u00e4ufig gestellte Fragen f\u00fcr K\u00e4ufer und Formulierer<\/h3>\n<p><strong>Why can a coating with good initial appearance still fail later?<\/strong><br \/>Because many failures show up only after full cure, storage, or service exposure, when adhesion, flexibility, or weatherability becomes the limiting factor.<\/p>\n<p><strong>Should coating additives be chosen one by one outside the full formula?<\/strong><br \/>It is usually safer to screen them inside the real formula because resin choice, pigments, and the rest of the additive package can change the result.<\/p>\n<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>\u3010English name\u3011Ethyl Vinyl Ether \u3010Molecular formula\u3011 C4H8O \u3010Molecular Weight\u301172.11 \u3010CAS Registration Number\u3011[109-92-2] \u3010Structural formula\u3011CH3CH2OCH=CH2 [Physical properties] bp 33 oC, d 0.753 g\/cm3. It is soluble in most organic solvents and<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-4937","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Commonly used reagents-ethyl vinyl ether - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"\u3010English name\u3011Ethyl Vinyl Ether \u3010Molecular formula\u3011 C4H8O \u3010Molecular Weight\u301172.11 \u3010CAS Registration Number\u3011[109-92-2] \u3010Structural formula\u3011CH3CH2OCH=CH2...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/de\/commonly-used-reagents-ethyl-vinyl-ether\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Commonly used reagents-ethyl vinyl ether - 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