Green and high efficient synthesis of triaza‐benzo[
<i>b</i>
]fluoren‐6‐one derivatives in water under microwave irradiation
作者:Qingqing Shao、Shujiang Tu、Chunmei Li、Longji Cao、Dianxiang Zhou、Bo Jiang、Yan Zhang、Wenjuan Hao、Qian Wang
DOI:10.1002/jhet.5570450218
日期:2008.3
Triaza-benzo[b]fluoren-6-one derivatives were synthesized via the three-component reaction of aldehyde, cyclohexane-1,3-dione compound and 2-aminobenzimidazole in waterundermicrowaveirradiation. The new protocol has the advantages of excellent yield, low cost, reduced environment impact, wide scope and convenient procedure.
在微波辐射下,通过醛,环己烷-1,3-二酮化合物和2-氨基苯并咪唑的三组分反应合成了三氮杂苯并[ b ]芴-6-一衍生物。新协议具有产量高,成本低,对环境影响小,适用范围广,操作方便等优点。
A new type of SO<sub>3</sub>H-functionalized magnetic-titania as a robust magnetically-recoverable solid acid nanocatalyst for multi-component reactions
作者:Elham Tabrizian、Ali Amoozadeh
DOI:10.1039/c6ra21048a
日期:——
the nanocatalyst was assessed for the synthesis of benzimidazoquinazolinones and polyhydroquinolines, in which the reaction conditions were optimized by applying central composite design (CCD) through response surface methodology. The nanocatalyst could be separated from the reaction mixture easily by magnetic decantation and reused at least six times without a noticeable degradation in catalytic activity
通过两步法合成了SO 3 H-官能化的磁性二氧化钛纳米颗粒(Fe 3 O 4 @ TDI @ TiO 2 -SO 3 H),包括将n-TiO 2共价接枝到n-Fe 3 O 4上。 通过2,4-甲苯二异氰酸酯作为区域选择性连接基(n-Fe 3 O 4 @ TDI @ TiO 2),然后使用氯磺酸进行磺化。制备的纳米催化剂的特征在于傅立叶变换红外光谱(FT-IR),热重分析(TGA),X射线衍射(XRD),场发射扫描电子显微镜(FE-SEM)和振动样品磁力法(VSM)。评估了纳米催化剂的催化活性,用于合成苯并咪唑并喹唑啉酮和聚氢喹啉,其中通过采用响应表面方法应用中心复合设计(CCD)优化了反应条件。可以通过磁倾析法容易地将纳米催化剂从反应混合物中分离出来,并重复使用至少六次,而催化活性没有明显降低。据我们所知,
Synthesis of benzoimidazoquinazolinone and indolylxanthenone derivatives using Keggin-type heteropoly-11-molybdo-1-vanadophosphoric acid supported on Montmorillonite K-10 clay as catalyst: a green approach
作者:Antony Muthu Prasanna、Murugan Kumaresan、Karuppaiah Selvakumar、Meenakshisundaram Swaminathan、Ponnusamy Sami
DOI:10.1007/s11164-022-04859-7
日期:2022.12
(PVMoK-10) as an efficient heterogeneous catalyst. The identification and characterization of the derivatives were done by physical as well as spectral techniques. Synthesis of ten derivatives of benzo[4,5]imidazo[2,1-b]quinazolin-1(2H)-one and two derivatives of 9-(1H-indol-3-yl)-2,3,4,9-tetrahydro-1H-xanthen-1-one was successfully achieved using this protocol. A tentative reaction mechanism has also
在生物学和医学上很重要的两种不同的有机支架,即。苯并咪唑和喹唑啉存在于称为苯并咪唑喹唑啉酮的杂环化合物类中。类似地,吲哚基呫吨酮是含有两个重要有机部分如吲哚和呫吨的化合物。在这项工作中,通过简单的一锅三组分缩合反应,在环保无溶剂条件下,获得了合成苯并咪唑并喹唑啉酮和吲哚基呫吨酮衍生物的新绿色方案。这种缩合是通过使用 10% 杂多 11-钼-1-钒磷酸(H 4 [PVMo 11 O 40]) 负载的蒙脱石 K-10 粘土材料 (PVMoK-10) 作为高效的非均相催化剂。衍生物的鉴定和表征是通过物理和光谱技术完成的。苯并[4,5]咪唑并[ 2,1- b ]喹唑啉-1( 2H )-1的十个衍生物和9-(1 H -indol-3-yl)-2,3,4的两个衍生物的合成,9-四氢-1 H -xanthen-1-one 使用该协议成功实现。还为合成计划提出了初步的反应机制。