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href="http://www.cdcfah.com/cp/first-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/second-_sysqm/">實(shí)驗(yàn)室器皿</a>?<a href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實(shí)驗(yàn)室用品</a>?南通2-甲基四氫呋喃廠家哪家好上海蔚云化工供應(yīng)</p><div id="ex8mjqs" class="leftbox clearfix"><h1>南通2-甲基四氫呋喃廠家哪家好上海蔚云化工供應(yīng)</h1><div id="rewyahy" class="proBig"><div id="fp2gdk7" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="l8xme2j" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ovxeb3l" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>南通2-甲基四氫呋喃廠家哪家好,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-02 08:27:39</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8jlsuwi" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海蔚云化工有限公司</a></p><p><span>聯(lián)系人：</span>盛志華</p><p><span>郵箱: </span>3273929241@qq.com</p><p><span>電話: </span>18721726651</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.weiyunhuagong.com</p><p><span>手機(jī): </span>021-52909928</p><p><span>地址: </span>靜安區(qū)靈石路709號55幢A2113室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="k2k3pe8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3szgikr" class="box"><p><p style="text-indent:25px">呋喃類藥是一類化學(xué)合成藥。能作用于細(xì)菌的酶系統(tǒng)，干擾細(xì)菌的糖代謝而有抑菌作用。使用的呋喃類藥物有10余種，較常用的有呋喃妥因、呋喃唑酮、呋喃西林等，臨床上因呋喃西林易引起多發(fā)性神經(jīng)炎，故只供外用。呋喃妥因（呋喃啶）***范圍較廣，對多種革蘭氏陽、陰性細(xì)菌均有控制作用，但對綠膿桿菌無效。吸收后由尿排泄，常用于***泌尿系***。細(xì)菌對本品不易產(chǎn)生耐藥性?？煽诜盟?。注意：腎功能不全者慎用。過敏反應(yīng)可致胸悶、氣喘等?？砂l(fā)生周圍神經(jīng)炎，表現(xiàn)為手足麻木及肌萎縮。中毒性精神癥狀則為幻視、幻聽等。胃腸道反應(yīng)，南通2-甲基四氫呋喃廠家哪家好、溶血性貧血及肺部并發(fā)癥也能發(fā)生。呋喃唑酮（痢特靈）***譜和呋喃啶相似，對消化道的多種細(xì)菌有控制作用，也可控制滴蟲?？诜蛰^少，主要在腸道起作用，主治腸炎、痢疾和傷寒等。對幽門螺旋菌有控制作用，故可用于***潰瘍病?？煽诜盟?。注意：常見胃腸反應(yīng)；常有遲發(fā)性皮疹、等反應(yīng)；也可發(fā)生肺浸潤、***、直立性低血壓、低血糖等反應(yīng)。本品可引起多發(fā)性神經(jīng)炎，南通2-甲基四氫呋喃廠家哪家好，每日量超過0.4克或總量超過3克時較易發(fā)生，癥狀可遷延至數(shù)月或一年以上，南通2-甲基四氫呋喃廠家哪家好，故應(yīng)密切控制用量。新生兒或先天缺少血球保護(hù)酶者可致溶血性貧血。四氫呋喃可用作溶劑、有機(jī)合成的原料。南通2-甲基四氫呋喃廠家哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南通2-甲基四氫呋喃廠家哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png"></div><p style="text-indent:25px">應(yīng)用實(shí)例：鹽酸曲馬多合成中的應(yīng)用鹽酸曲馬多，在抗HIV藥替普那韋合成中的應(yīng)用替普那韋，在血管緊張素轉(zhuǎn)化酶控制劑馬來酸依那普利合成中的應(yīng)用馬來酸依那普利，在抗***藥氟康唑合成中的應(yīng)用氟康唑，在抗藥三尖杉酯堿合成中的應(yīng)用，在抗抑郁藥鹽酸安非他酮合成中的應(yīng)用芳樟醇芳香酮，在芳樟醇/香酮合成中的應(yīng)用，在農(nóng)藥草銨膦合成中的應(yīng)用，在聯(lián)苯醇的合成中應(yīng)用。 MeTHF凝固點(diǎn)為-136℃，因而它可以替代THF用于低溫下有機(jī)鋰反應(yīng)。在有機(jī)鋰化學(xué)中，使用MeTHF作溶劑與THF相比，不僅分離方便，而且所得的鋰。南通2-甲基四氫呋喃廠家哪家好四氫呋喃分子在常溫常壓下有較小粘稠度的有機(jī)液體。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南通2-甲基四氫呋喃廠家哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624039166387/6007011.png"></div><p style="text-indent:25px">當(dāng)以2-甲基四氫呋喃為溶劑，Ag2CO3為氧化劑，三甲基環(huán)三硼氧烷為甲基化試劑，Cp*Co(PhH)(PF6)2作為催化劑，可獲得較佳反應(yīng)結(jié)果（Table 1）。對底物范圍進(jìn)行了擴(kuò)展。反應(yīng)結(jié)果表明，藥物分子中常見的氮雜環(huán)（3a–3e）或者酰胺基團(tuán)（3f–3p），均與體系兼容。一級酰胺由于缺乏導(dǎo)向基團(tuán)，從而導(dǎo)致具有合成難度，但增加催化劑用量，也可以實(shí)現(xiàn)鄰位的甲基化（3k-3m）。二級苯甲酰胺（3f-3j）不論是否有立**阻或環(huán)狀，都是很好的底物。三級酰胺1n 和1o可以選擇性的單甲基化，含溴的底物3o也沒有出現(xiàn)副反應(yīng)。底物3p和3z的產(chǎn)物出現(xiàn)了區(qū)域選擇性產(chǎn)物。醛和酮與含氮相比堿性更弱，少見作為C-H活化的底物，但在富電子的芳香環(huán)上，這個方法可以生成3q和3s。稠環(huán)芳香烴，可以選擇性的在1-位甲基化。然而，酯和羧酸不適用該體系。</p><p style="text-indent:25px">四氫呋喃是一種重要的有機(jī)化工及精細(xì)化工原料，普遍應(yīng)用于樹脂溶劑（磁帶涂層、PVC表面涂層、清洗PVC反應(yīng)器、脫除PVC薄膜、玻璃紙涂層、塑料印刷油墨、熱塑性聚氨酯涂層）；反應(yīng)溶劑（格式試劑、烷基堿金屬化合物和芳基堿金屬化合物、氫化鋁和氫化硼、甾族化合物和大分子有機(jī)聚合物）；化學(xué)中間產(chǎn)物（聚合生成PTMEG、天然氣加味劑）；色譜溶劑（凝膠滲透色譜法）。聚四氫呋喃主要用作嵌段聚氨酯或嵌段聚醚聚酯的軟鏈段。由平均分子量為1000的聚四氫呋喃制得的嵌段聚氨酯橡膠，可用作輪胎、傳動帶、墊圈等;也可用于涂料、人造革、薄膜等。制得的嵌段聚醚聚酯為熱塑性彈性體。平均分子量為2000的聚四氫呋喃，可用以制聚氨酯彈性纖維。由聚四氫呋喃制成的嵌段聚氨酯具有良好的抗凝血性，可用作醫(yī)用高分子材料。2-甲基四氫呋喃是一種有機(jī)化合物，分子式是C5H10O。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南通2-甲基四氫呋喃廠家哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624097545321/7454619.png"></div><p style="text-indent:25px">操作注意事項(xiàng)：密閉操作，多方面通風(fēng)。操作人員必須經(jīng)過專門培訓(xùn)，嚴(yán)格遵守操作規(guī)程。建議操作人員佩戴過濾式防毒面具（半面罩），戴安全防護(hù)眼鏡，穿防靜電工作服，戴橡膠耐油手套。遠(yuǎn)離火種、熱源，工作場所嚴(yán)禁吸煙。使用防爆型的通風(fēng)系統(tǒng)和設(shè)備。防止蒸氣泄漏到工作場所空氣中。避免與氧化劑、酸類、堿類接觸。灌裝時應(yīng)控制流速，且有接地裝置，防止靜電積聚。搬運(yùn)時要輕裝輕卸，防止包裝及容器損壞。配備相應(yīng)品種和數(shù)量的消防器材及泄漏應(yīng)急處理設(shè)備。倒空的容器可能殘留有害物儲存注意事項(xiàng)：通常商品加有阻聚劑。儲存于陰涼、通風(fēng)的庫房。遠(yuǎn)離火種、熱源。庫溫不宜超過30℃。包裝要求密封，不可與空氣接觸。應(yīng)與氧化劑、酸類、堿類等分開存放，切忌混儲。采用防爆型照明、通風(fēng)設(shè)施。禁止使用易產(chǎn)生火花的機(jī)械設(shè)備和工具。儲區(qū)應(yīng)備有泄漏應(yīng)急處理設(shè)備和合適的收容材料。2-甲基四氫呋喃含量低,容易處理。宿遷2-甲基四氫呋喃規(guī)格是多少</p><p style="text-indent:25px">四氫呋喃用作溶劑、有機(jī)合成的原料。南通2-甲基四氫呋喃廠家哪家好</p><p style="text-indent:25px">與氧化劑接觸猛烈反應(yīng)。流速過快,容易產(chǎn)生和積聚靜電。其蒸氣比空氣重,能在較低處擴(kuò)散到相當(dāng)遠(yuǎn)的地方,你好四氫糠醇和溴化氫能反應(yīng)，能生成2-溴甲基四氫呋喃。你好四氫糠醇和溴化氫能反應(yīng)，能生成2-溴甲基四氫呋喃。這是因?yàn)樗臍淇反季哂胁嫉幕瘜W(xué)性質(zhì)，所以可以和溴化氫通過雙分子親核取代機(jī)制(SN2)反應(yīng)生成2-溴甲基四氫呋喃。四氫呋喃極性強(qiáng)四氫呋喃是一類雜環(huán)有機(jī)化合物。它是強(qiáng)的極性醚類之一,半數(shù)致死量：二甲亞砜（大鼠，經(jīng)口）17.9ml/經(jīng)口)7.6ml/kg，四氫呋喃(大鼠,如極性分子與非極性分子之間一般不能互溶。（有時要看看有沒有溶劑化作用，如溴是非極性分子，水是極性分子，除了反應(yīng)還有溶劑化作用。）組成這兩種物質(zhì)的化學(xué)鍵是否相同。南通2-甲基四氫呋喃廠家哪家好</p><p style="text-indent:25px">上海蔚云化工有限公司擁有化工產(chǎn)品（除危險化學(xué)品、監(jiān)控化學(xué)品、煙花爆竹、民用物品、易制毒化學(xué)品）、化工機(jī)械設(shè)備及配件的銷售，在化工技術(shù)領(lǐng)域內(nèi)從事技術(shù)開發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)服務(wù)、技術(shù)咨詢?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】等多項(xiàng)業(yè)務(wù)，主營業(yè)務(wù)涵蓋環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺。一批專業(yè)的技術(shù)團(tuán)隊(duì)，是實(shí)現(xiàn)企業(yè)戰(zhàn)略目標(biāo)的基礎(chǔ)，是企業(yè)持續(xù)發(fā)展的動力。公司業(yè)務(wù)范圍主要包括：環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺等。公司奉行顧客至上、質(zhì)量為本的經(jīng)營宗旨，深受客戶好評。公司憑著雄厚的技術(shù)力量、飽滿的工作態(tài)度、扎實(shí)的工作作風(fēng)、良好的職業(yè)道德，樹立了良好的環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺形象，贏得了社會各界的信任和認(rèn)可。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1812944.html</p></div></div></div></div></div><div id="nevceqn" class="page-right twoColRt"><div id="h3ml3mw" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="zlc38pw" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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