表皮生长因子受体(EGFR)是抗癌化合物开发的重要靶点之一,是ErbB受体酪氨酸激酶受体家族的成员,在实体瘤中高度表达。抑制EGFR对于癌症治疗以抑制表达EGFR的肿瘤细胞的进展和生长很重要。靶向 EGFR 的药物是治疗各种癌症的成功药物,特别是结肠直肠癌、头癌、颈癌、肺癌和乳腺癌。本研究旨在设计一些与EGFR激酶相互作用的新型苯并咪唑类化合物,合成和分析这些化合物,并评价它们的体外生物学活性。为了达到目标化合物,通过使酰肼与异硫氰酸烷基酯反应,形成氨基硫脲,然后用浓硫酸或氢氧化钠、噻二唑或三唑衍生物环化这些化合物。研究结果共获得了 38 个新的苯并咪唑衍生物,并通过元素分析、质量、1 H 和13 C NMR 光谱。此外,化合物4c的结构已通过 X 射线晶体学得到证实。还对合成的化合物进行了分子对接研究,选择了一些具有高对接分数的分子,并测试了 EGFR 激酶抑制剂的特性。在测试的化合物中,确定活性最高的化合物是12a,它在
Graphite-Supported Gold Nanoparticles as Efficient Catalyst for Aerobic Oxidation of Benzylic Amines to Imines and<i>N</i>-Substituted 1,2,3,4-Tetrahydroisoquinolines to Amides: Synthetic Applications and Mechanistic Study
作者:Man-Ho So、Yungen Liu、Chi-Ming Ho、Chi-Ming Che
DOI:10.1002/asia.200900261
日期:2009.10.5
of N‐substituted 1,2,3,4‐tetrahydroisoquinolines in the presence of aqueous NaHCO3 solution gave the corresponding amides in good yields (83–93 %) with high selectivity (up to amide/enamide=93:4) (6 examples). The same protocol can be applied to the synthesis of benzimidazoles from the reaction of o‐phenylenediamines with benzaldehydes under aerobic conditions (8 examples). By simple centrifugation
使用氧气作为末端氧化剂对胺进行选择性氧化是绿色化学中的重要领域。在这项工作中,我们描述了使用石墨负载的金纳米颗粒(AuNPs / C)催化环状和非环状苄胺的好氧氧化为相应的亚胺,具有中等至优异的底物转化率(43-100%)和产品收率(66–99%)(19个例子)。在NaHCO 3水溶液存在下,对N-取代的1,2,3,4-四氢异喹啉进行氧化,得到的酰胺产率高(83-93%),选择性高(酰胺/酰胺= 93:4)( 6个示例)。相同的协议可以从反应被施加到苯并咪唑的合成Ò在好氧条件下将苯二胺与苯甲醛一起使用(8个例子)。通过简单的离心,可以回收AuNPs / C并重复使用十次,以将二苄基胺氧化为N-亚苄基(苯基)甲胺,而不会显着降低催化活性和选择性。可以将协议“ AuNPs / C + O 2 ”调整为克级,通过氧化10 g 1,2,3,4-可以得到8.9 g(84%分离出的产率)3,4-二氢异
Perfect symmetrical cyclic aromatic trimer motif in tripodal molecule
作者:Shankar Deval Sathiyashivan、Chakka Kiran Kumar、Bhaskaran Shankar、Malaichamy Sathiyendiran、Dhanraj T. Masram
DOI:10.1039/c7ra01682d
日期:——
A family of substituted benzimidazolyl-based tripodal molecules with alkyl substituted spacers was synthesized, showing perfect symmetric cyclic aromatic trimer motifs which remained intact in the solid as well as solution state.
Magnetic nanoparticle-supported DABCO tribromide: a versatile nanocatalyst for the synthesis of quinazolinones and benzimidazoles and protection/deprotection of hydroxyl groups
supported on magnetic Fe3O4 nanoparticles (MNPs-DABCO tribromide) as a novel heterogeneous tribromide type compound was found to be an efficient and reusable nanocatalyst for the one-pot synthesis of 2-arylquinazolin-4(3H)-ones and 2-aryl-1H-benzo[d]imidazoles through oxidative cyclization of aldehydes with 2-aminobenzamides and 1,2-phenylenediamine, respectively. Also, MNPs-DABCO tribromide catalyzed tr
发现一种新型的非均相三溴化物类型化合物,负载在磁性Fe 3 O 4纳米颗粒上的1,4-二氮杂双环[2.2.2]辛烷三溴化物(MNPs-DABCO三溴化物)是一种高效且可重复使用的纳米催化剂,可用于一锅法合成2通过分别用2-氨基苯甲酰胺和1,2-苯二胺对醛进行氧化环化反应,制得-芳基喹唑啉-4(3 H)-ones和2-芳基-1 H-苯并[ d ]咪唑。而且,MNPs-DABCO三溴化物通过在室温下改变溶剂介质,催化了多种醇和酚的三甲基甲硅烷基化/四氢吡喃基化和甲硅烷基化/脱吡喃基化。
Graphene oxide‐catalyzed C
<sub>Sp3</sub>
–H activation of methylarenes in aqueous medium: A unified metal‐free access to amides and benzimidazoles
作者:Anshu Dandia、Dinesh Kumar Mahawar、Ruchi Sharma、Ranveer Singh Badgoti、Kuldeep S. Rathore、Vijay Parewa
DOI:10.1002/aoc.5232
日期:2019.11
Graphene oxide (GO)‐catalyzed selective synthesis of amides via CSp3–H activation of methylarenes and consequent C–N bond formation with anilines under aqueous medium has been described. Oxygen functionality allied with GO surface played a dual role both as acid catalyst and oxidizingagent to some extent. However, GO has a copious effect on the reaction, shown by a high TOF value with TBHP as co‐oxidant