An efficient synthesis of nitrogen ring junction pyrimido-indazoles has been developed. This is a metal catalyzed transformation that proceeds via A3 coupling reaction between 1H-indazol-3-amine, aromatic aldehydes and alkynes, which undergoes 6-endo-dig cyclization leading to the highly functionalized pyrimido[1,2-b]indazoles. Response surface methodology (RSM) was used to investigate the effect of
已经开发了氮环连接的嘧啶-吲唑的有效合成方法。这是一种金属催化的转化,其通过1 H-吲哚-3-胺,芳族醛和炔烃之间的A 3偶联反应进行,该偶联反应经过6-内挖-环化反应,从而导致高度官能化的嘧啶并[1,2- b ]吲唑。响应面法(RSM)用于研究催化剂(A 1),反应温度(B 1)和时间(C 1)的影响。计算了嘧啶并[1,2- b ]吲唑的荧光量子产率。
Synthesis of pyrimidine derivatives via multicomponent reaction catalyzed by ferric chloride
An eco‐friendly and practical approach was developed for the synthesis of pyrimidine derivatives via a one‐pot, three‐component coupling reaction of commercially available aldehydes, alkynes, and indazole3/triazole catalyzed by ferricchloride with good to excellent yields. The advantages of this method include environmentally friendly catalyst, easily available materials, and ease of product isolation
Green synthesis and characterization of silver nanoparticles (Ag NPs) from extract of plant Radix Puerariae: An efficient and recyclable catalyst for the construction of pyrimido[1,2-b]indazole derivatives under solvent-free conditions
作者:Sandip Gangadhar Balwe、Vijay Vilas Shinde、Ashish A. Rokade、Seong Soo Park、Yeon Tae Jeong
DOI:10.1016/j.catcom.2017.06.006
日期:2017.8
friendly approach for the synthesis of silver nanoparticles (Ag NPs) using Radix Puerariae plant extract via a novel chemical route. The prepared Ag NPs has been characterized by TEM, XRD, SEM, DLS, EDX, and UV–Vis. Further, catalytic application of this fascinating nanomaterial has been utilized in the synthesis of biologically important pyrimido[1,2-b]indazole derivatives via one-pot three-component coupling
我们已经开发了一种绿色环保方法,用于通过葛根植物提取物通过新颖的化学途径合成银纳米颗粒(Ag NPs)。制备的银纳米颗粒已通过TEM,XRD,SEM,DLS,EDX和UV-Vis进行了表征。此外,这种令人着迷的纳米材料的催化应用已用于在无溶剂条件下通过醛,炔烃和胺之间的一锅三组分偶联反应以优异的收率合成生物学上重要的嘧啶并[1,2- b ]吲唑衍生物。 。催化反应完成后,Ag NPs可以轻松回收并重复使用四次,而不会显着降低其催化活性。