{"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\/it\/commonly-used-reagents-ethyl-vinyl-ether\/","title":{"rendered":"Reagenti comunemente utilizzati: etilvinil etere"},"content":{"rendered":"<!-- lc-qa-start -->\n<p><strong>Risposta rapida:<\/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>Nome inglese\u3011Etil Vinil Etere<\/p>\n\n\n\n<p>Formula molecolare\u3011 C4H8O<\/p>\n\n\n\n<p>Peso molecolare\u301172.11<\/p>\n\n\n\n<p>Numero di registrazione CAS [109-92-2]<\/p>\n\n\n\n<p>Formula strutturale\u3011CH3CH2OCH=CH2<\/p>\n\n\n\n<p>[bp 33 oC, d 0,753 g\/cm3. \u00c8 solubile nella maggior parte dei solventi organici e pu\u00f2 essere utilizzato in una variet\u00e0 di solventi organici.<\/p>\n\n\n\n<p>[Questo reagente \u00e8 venduto nelle aziende di reagenti chimici in patria e all'estero.<\/p>\n\n\n\n<p>[Questo reagente \u00e8 un prodotto chimico altamente volatile e infiammabile. Si raccomanda di conservarlo in un luogo asciutto e a bassa temperatura e di utilizzarlo in una cappa di aspirazione.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>L'etere etilvinilico \u00e8 utilizzato principalmente come gruppo protettivo del gruppo ossidrilico, reagente di trasferimento vinilico e partecipa alla reazione di addizione di ciclizzazione nella sintesi organica.<\/p>\n\n\n\n<p>Tra i numerosi gruppi protettori per i gruppi idrossi, l'\u03b1-etossi etil etere (EE) formato da etil vinil etere e idrossi \u00e8 uno dei gruppi protettori pi\u00f9 usati e convenienti. La reazione richiede generalmente un catalizzatore acido forte, a questo scopo si possono usare TFA e TsOH, il pi\u00f9 comunemente usato \u00e8 il PPTS. La reazione viene solitamente completata agitando per diverse ore a temperatura ambiente. Nella maggior parte dei casi, la resa del prodotto \u00e8 superiore a 95% (Formula 1) [1,2]. Il gruppo protettore EE pu\u00f2 facilmente completare la reazione di deprotezione in condizioni acide. I metodi consigliati sono PPTS-EtOH e HCl-MeOH aq. (Equazione 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>Sotto l'azione del catalizzatore derivato dell'acetato mercurico, l'etil vinil etere e l'idrossile subiscono una reazione di trasferimento vinilico per generare il corrispondente prodotto vinil etere (Formula 3) [5]. Se si utilizza un catalizzatore di palladio metallico, si pu\u00f2 evitare efficacemente l'uso di un catalizzatore di mercurio metallico (Formula 4) [6]. Questa reazione \u00e8 pi\u00f9 significativa perch\u00e9 il prodotto pu\u00f2 subire ulteriori reazioni di condensazione o metatesi di olefine [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>L'etil vinil etere e l'allile idrossile subiscono una reazione di trasferimento vinilico per generare il corrispondente prodotto vinil etere. La reazione viene solitamente completata sotto la catalisi dell'acetato mercurico. Il riscaldamento del prodotto in toluene o xilene pu\u00f2 indurre il corrispondente riarrangiamento di Claisen, rendendo la reazione di importante valore sintetico. In circostanze normali, il processo di reazione a due fasi pu\u00f2 essere completato nelle condizioni di \"one-pot cooking\" (Equazione 5, Equazione 6) [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 presenza di catalizzatori di acidi di Lewis, anche l'etilviniletere pu\u00f2 subire la corrispondente reazione di ciclizzazione [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>Riferimenti prodotto consigliati<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/it\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> Un riferimento antischiuma bilanciato per rivestimenti a base acquosa e molte applicazioni generali di controllo della schiuma.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/it\/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\/it\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> Un'opzione antischiuma pi\u00f9 forte per il processo quando la schiuma persistente sopravvive a condizioni pi\u00f9 severe.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/it\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<\/ul>\n<h3>FAQ per acquirenti e formulatori<\/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\/it\/commonly-used-reagents-ethyl-vinyl-ether\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Commonly used reagents-ethyl vinyl ether - 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