• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Covalently anchored 2-amino ethyl-3-propyl imidazolium bromideon SBA-15 as a green, efficient and reusable Bronsted basic ionic liquid nanocatalyst for one-pot solvent-free synthesis of benzopyranopyrimidines under ultrasonic irradiation
【24h】

Covalently anchored 2-amino ethyl-3-propyl imidazolium bromideon SBA-15 as a green, efficient and reusable Bronsted basic ionic liquid nanocatalyst for one-pot solvent-free synthesis of benzopyranopyrimidines under ultrasonic irradiation

机译：共价锚定的2-氨基乙基-3-丙基咪唑鎓溴化SBA-15，是一种绿色，高效且可重复使用的布朗斯台德碱性离子液体纳米催化剂，可在超声辐射下一锅无溶剂地合成苯并吡喃并嘧啶

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the present study, highly ordered mesoporous SBA-15 having Bronsted basic ionic liquid pore channels was synthesized via a surfactant-templated sol-gel methodology and a post modification process. For this, well ordered mesoporous chloro-functionalized SBA-15, SBA-Cl, was first synthesized by the direct incorporation of chloropropyl groups through the co-condensation of TEOS and CPTMS precursors in the presence of Pluronic P123 triblock copolymer as a supramolecular template to direct the organization of polymerizing silica. Subsequently, highly ordered 2-amino ethyl-3-propyl imidazolium bromide functionalized mesoporous SBA-15, SBA-Im-NH2, with a high surface area was synthesized by a nucleophilic substitution reaction of SBA-Cl with imidazole and then quaternization with 2-bromo ethylamine hydrobromide. The target organic-inorganic nanocomposite was characterized by FT-IR spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), elemental analysis (CHN) and Brunauer-Emmett-Teller (BET) analysis. The SBA-Im-NH2 nanocomposite was successfully used as an efficient Bronsted basic ionic liquid nanocomposite for the preparation of benzopyranopyrimidine derivatives by the one-pot pseudo four-components reaction of salicylaldehydes, malononitrile and secondary amines under ultrasonic and solvent-free conditions at room temperature. This method has the advantages of high yields, cleaner reaction, simple methodology, short reaction times, easy work-up, and greener conditions. In addition to the facility of this methodology, the catalyst also enhances product purity and promises economic as well as environmental benefits.
机译：在本研究中，通过表面活性剂模板的溶胶-凝胶法和后改性工艺合成了具有布朗斯台德碱性离子液体孔通道的高序介孔SBA-15。为此，首先通过在Pluronic P123三嵌段共聚物作为超分子模板存在下，通过TEOS和CPTMS前体的共缩合将氯丙基直接掺入来合成有序介孔的氯官能化SBA-15，即SBA-Cl。指导二氧化硅聚合的组织。随后，通过SBA-Cl与咪唑的亲核取代反应，然后用2-季铵化，合成了具有高表面积的高度有序的2-氨基乙基-3-丙基咪唑鎓溴化的SBA-15，SBA-Im-NH2。溴乙胺氢溴酸盐。通过红外光谱，扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线衍射（XRD），热重分析（TGA），元素分析（CHN）和Brunauer- Emmett-Teller（BET）分析。 SBA-Im-NH2纳米复合材料被成功用作布朗斯台德碱性离子液体纳米复合材料，通过水杨醛，丙二腈和仲胺在室温下在超声波和无溶剂条件下的一锅式假四组分反应制备苯并吡喃并嘧啶衍生物。温度。该方法具有收率高，反应更清洁，方法简单，反应时间短，后处理容易，绿色环保的优点。除了该方法的便利性之外，催化剂还提高了产品纯度，并有望带来经济和环境效益。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号