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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="t38o9da" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>非手性氮哌啶化合物價(jià)格,哌啶</p><p><span>***更新：</span>2021-01-10 01:20:00</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="dskhjqc" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海畢得醫(yī)藥科技有限公司</a></p><p><span>聯(lián)系人：</span>邱鴻婷</p><p><span>郵箱: </span>3003495196@qq.com</p><p><span>電話: </span>13818398014</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>https://www.bidepharm.com</p><p><span>手機(jī): </span>021-61629020</p><p><span>地址: </span>翔殷路128號(hào)11號(hào)樓A座101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="jiacz8y" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="clxuwfw" class="box"><p><p style="text-indent:25px">氨基酸（AAs）價(jià)格便宜，容易獲得，帶有手性碳片段，是不對(duì)稱合成的必需元素。它們?cè)谏飳W(xué)上很重要，由氨基（eNH2）和羧酸（eCOOH）基團(tuán)組成，并且在各自特定的不同位置具有側(cè)鏈。它們的雙官能度和光學(xué)純度以及其官能團(tuán)位置的變化使它們成為通用的合成子，可用于構(gòu)建多種重要的旋光性雜環(huán)。氨基酸（AAS）通常被認(rèn)為是肽和蛋白質(zhì)的重要??支架，非手性氮哌啶化合物價(jià)格。然而，在過(guò)去的幾十年中，它們已被用作各種雜環(huán)體系的合成的重要合成器，特別是對(duì)于應(yīng)通過(guò)不對(duì)稱合成獲得一個(gè)特定立體異構(gòu)體的合成。雖然AAS作為雜環(huán)化合成的應(yīng)用是在1995年廣審查的，但許多關(guān)于其用于建造各種不同大小的雜交的報(bào)告的報(bào)告使得該主題是有價(jià)值的更新，非手性氮哌啶化合物價(jià)格，非手性氮哌啶化合物價(jià)格。一種雜環(huán)砌塊的方法：合成含有[5,6]吡喃[2,3-C]吡唑-4（1H）- 酮部分的新型環(huán)形系統(tǒng)。非手性氮哌啶化合物價(jià)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="非手性氮哌啶化合物價(jià)格,哌啶" src="https://tyunfile.71360.com/WaterMark/UploadFile/shbdyykj/637439115877016554/6531512.png"></div><p style="text-indent:25px">亞硝基廣用于有機(jī)合成中，1a–c主要用作親電試劑和1,3-偶極子，1d–f也具有立體定向方式，1d–h和自旋阱； 1a–c，i–k具有也被用作羰基的活性當(dāng)量。1c，l–m，2a然而，關(guān)于α-氨基硝酮的報(bào)道很少。2它們可以衍生自腈和羥胺，2a來(lái)自亞氨基甲酸酯或a-氯亞胺，2g來(lái)自羥胺和亞甲基胺，2g，3d來(lái)自仲胺2f和亞硝基化合物，以及其他硝酮。2b研究了互變異構(gòu)體2a，3d和a-氨基硝酮的晶體結(jié)構(gòu)2a，3d，但*報(bào)道了使用此類化合物Prabhakar及其同事[2a]提供了合成中的化合物，他們?cè)趩瓮榛投；磻?yīng)中利用了α-氨基硝酮的親核中心。從3-氧代丁酸N-吡啶-2-基酰胺和亞硝基苯以良好的產(chǎn)率獲得穩(wěn)定的α-酰胺基-α-氨基硝酮。然后，將α-酰胺基-α-氨基硝酮用作新的通用構(gòu)建基塊，以通過(guò)雙親電子試劑和雙親核試劑獲得各種雜環(huán)。以二碘甲烷為試劑，形成1.2,5-惡二嗪衍生物，而與芳香族1,2-，1,3-和1,4-二胺反應(yīng)生成喹喔啉，喹唑啉，嘧啶和二苯并[d，f] [1， 3]二氮雜derivatives衍生物。上海Segphos哌啶LiAlh4誘導(dǎo)的選擇性環(huán)吡啶朝向2-（氨基甲基）吡咯烷和3-氨基哌啶作為符合條件的雜環(huán)砌塊。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="非手性氮哌啶化合物價(jià)格,哌啶" src="https://tyunfile.71360.com/WaterMark/UploadFile/shbdyykj/637439115893520388/4013149.png"></div><p style="text-indent:25px">乙酰二羧酸二甲酯（DMAD）是具有兩個(gè)反應(yīng)性酯基的電子缺乏乙炔化合物。它是一種特權(quán)和優(yōu)勢(shì)的分子，其在雜環(huán)中容易且實(shí)際地參與。由于存在兩種酯吸電子基團(tuán)，DMAD容易經(jīng)歷邁克爾添加，然后雜環(huán)化以提供具有不同環(huán)尺寸的通用雜環(huán)化合物。 DMAD在溫和條件下進(jìn)行Diels-Alder反應(yīng)，得??到雜環(huán)，其不能通過(guò)常規(guī)雜環(huán)容易地合成。使用DMAD開(kāi)通了珍貴的網(wǎng)關(guān)，以合成一些重要的融合環(huán)雜環(huán)系統(tǒng)，既不通過(guò)替代路徑易于獲得，也不是通過(guò)使用市售的起始材料來(lái)獲得。近來(lái)科學(xué)家正嘗試突出DMAD在各種雜環(huán)化合物的合成中的應(yīng)用。</p><p style="text-indent:25px">許多吡啶硫酮具有生物活性。考慮到對(duì)利用容易獲得的烯胺酮作為起始原料開(kāi)發(fā)多官能取代的雜芳族化合物的有效合成的興趣。因此，用氰基硫代乙酰胺或氰基乙酰胺處理烯胺酮3得到吡啶硫酮5a和吡啶酮5b。化合物在回流的乙醇鈉中與α-鹵代酮反應(yīng)，得到噻吩并吡啶衍生物?；衔?a與碘甲烷反應(yīng)得到2-甲基硫代吡啶。吡啶硫酮5a與二甲基甲酰胺-二甲基乙縮醛縮合得到加合物，與水合肼得到?；衔?a與芳基亞甲基腈反應(yīng)得到苯乙烯基衍生物14a-d?；衔?4a-d也是在相同條件下由5a與芳族醛縮合制備的。噻吩并吡啶衍生物9a-d與原甲酸三乙酯，乙酸酐，二硫化碳和亞硝酸鈉的回流，分別得到化合物。氨基吡唑12在回流的DMF中與二甲基氨基苯乙酮鹽酸鹽24或烯胺酮30反應(yīng)，得到化合物26a-d?；衔锱cDMF-DMA反應(yīng)得到，其與化合物反應(yīng)得到直接由12與烯胺酮反應(yīng)制備的38 2.用亞硝酸將12重氮化，然后與不同的活性亞甲基試劑偶聯(lián)，得到吡啶并噻吩并三嗪42a，b。亞芐基苯乙酮與12的反應(yīng)產(chǎn)生吡啶并吡唑并嘧啶44?；衔?2也直接與活性亞甲基反應(yīng)，得到吡啶并吡唑并嘧啶衍生物46a，b。Phe-Gly模擬物的設(shè)計(jì)，合成和評(píng)價(jià)：假肽的雜環(huán)砌塊。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="非手性氮哌啶化合物價(jià)格,哌啶" src="https://tyunfile.71360.com/WaterMark/UploadFile/shbdyykj/637439115837612467/2408769.png"></div><p style="text-indent:25px"> 使1,3-二苯基-丙烷-2-酮與等摩爾量的二甲基甲酰胺二甲基縮醛反應(yīng)，得到烯胺酮4。這與另一等分子量的二甲基甲酰胺二甲基縮醛反應(yīng)，得到二烯胺酮5?；衔?與氰基硫代乙酰胺和氰基乙酰胺縮合得到2- 硫代-和2-氧代吡啶-3-腈衍生物6a，b。化合物6a與cc-氯acetone8反應(yīng)生成噻吩并[2,3-b]吡啶衍生物10，該衍生物進(jìn)一步環(huán)化成4,7,8-三取代吡啶并[2'，3'：2,3]噻吩并[4,5] -d]嘧啶12?；衔?還通過(guò)在乙酸銨存在下與乙酰乙酸乙酯在乙酸中反應(yīng)而得到2,5,6-三取代的煙酸乙酯13。二烯胺5與乙酸，乙酸銨/乙酸，苯肼和5-氨基-3-甲基吡唑反應(yīng)生成3,5-二苯基-吡喃-4-酮15a，3,5-二苯基-1H-吡啶-4-酮 15b和1,3,5-三取代的吡啶-4-酮16a-b。哌啶.中文同義詞六氫吡啶六氫吡啶哌啶氮己環(huán)一氮六環(huán)派盯一氮六圜Ⅲ型聚丙烯聚丙烯(無(wú)規(guī)共聚) 胡椒啶。手性氨基膦相關(guān)哌啶原料藥</p><p style="text-indent:25px">用作雜環(huán)合成中的結(jié)構(gòu)取代的烯胺：雜環(huán)合成中的砌塊：乙二甲?；陮?duì)電泳試劑的反應(yīng)性。非手性氮哌啶化合物價(jià)格</p><p style="text-indent:25px">由于部分氟化化合物作為藥物，農(nóng)藥，聚合物等的廣應(yīng)用，將三氟甲基選擇性引入有機(jī)分子變得越來(lái)越重要。除了開(kāi)發(fā)高選擇性三氟甲基化劑外，開(kāi)發(fā)三氟甲基取代的結(jié)構(gòu)單元也是一項(xiàng)挑戰(zhàn)。有機(jī)化學(xué)的任務(wù)。 3,3,3-三氟acetone酸鹽或相應(yīng)的水合物是用于合成三氟甲基取代的雜環(huán)的通用雙親電子結(jié)構(gòu)單元。與1，3-雙親核試劑（如脲，苯酚或苯胺）反應(yīng)可得到五元環(huán)。與1,4-雙親核試劑（氨基脲，氨基甲酰胺，鄰苯二胺）形成六元雜環(huán)。3,3,3-三氟acetone酸鹽與am的反應(yīng)可以高收率獲得4-羥基-4-三氟甲基-2-咪唑啉-5-酮。隨后用亞硫酰氯處理這些雜環(huán)得到4-氯-4-三氟甲基-2-咪唑啉-5-酮，其被證明是通用的三氟甲基取代的結(jié)構(gòu)單元。用多種雜原子和碳親核試劑取代氯化物是可行的。用重氮化合物擴(kuò)環(huán)得到三氟甲基取代的嘧啶。非手性氮哌啶化合物價(jià)格</p><p> 上海畢得醫(yī)藥科技有限公司成立于2007年，總部位于上海市楊浦區(qū)理工大學(xué)國(guó)家大學(xué)科技園，是一家以醫(yī)藥中間體相關(guān)產(chǎn)品的研發(fā)、生產(chǎn)、銷售及合成定制為主的****。自公司成立以來(lái)，始終堅(jiān)持信譽(yù)至上，質(zhì)量過(guò)硬的企業(yè)信條，產(chǎn)品被應(yīng)用于生命科學(xué)、有機(jī)化學(xué)、材料科學(xué)、分析化學(xué)與其他學(xué)科的研發(fā)及生產(chǎn)領(lǐng)域，銷售范圍遍及全球。目前，公司與諸多國(guó)內(nèi)**醫(yī)藥研發(fā)單位建立了合作伙伴關(guān)系。 </p> <p> 公司位于上海理工大學(xué)科技園的行政辦公中心面積達(dá)1,700平米，在藥谷設(shè)立的研發(fā)中心面積1,800平米，包括化學(xué)合成實(shí)驗(yàn)室和公斤級(jí)實(shí)驗(yàn)室，并配有現(xiàn)代化倉(cāng)儲(chǔ)物流中心。公司優(yōu)勢(shì)產(chǎn)品包括特色雜環(huán)化合物、含氟化合物、手性化合物、氨基酸及其衍生物、硼酸及其衍生物等，已有多項(xiàng)科研項(xiàng)目獲得國(guó)家發(fā)明專利。 </p> <p> 為確保產(chǎn)品質(zhì)量，公司引進(jìn)了先進(jìn)齊全的分析測(cè)試設(shè)備，包括400MHz核磁共振儀(NMR)、電感耦合等離子體發(fā)射光譜儀(ICP)、液質(zhì)聯(lián)用儀(LCMS)等，并配以嚴(yán)格的質(zhì)量管理體系。公司簽有具備GMP資質(zhì)的合作工廠，配備專業(yè)的研發(fā)團(tuán)隊(duì)，形成了從小試、中試到工業(yè)化規(guī)模的生產(chǎn)能力，滿足客戶定制合成、目錄試劑采購(gòu)及合成外包生產(chǎn)的需求。 </p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2776224.html</p></div></div></div></div></div><div id="8stl28j" 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