A Mild and Regioselective Route to Functionalized Quinazolines
作者:Tracy M. M. Maiden、Stephen Swanson、Panayiotis A. Procopiou、Joseph P. A. Harrity
DOI:10.1002/chem.201502891
日期:2015.10.5
A Rh‐catalyzed ortho‐amidation cyclocondensation sequence gave a range of 4‐aminoquinazolines in high yield. The method features a remarkably mild C(sp2)H activation step and can be exploited to rapidly access compounds with established biological activity.
A rare, ruthenium‐catalyzed, oxazolinlyl assistedC−Hfunctionalization and three‐componentcascadecyclization for the synthesis of isoquinolinones via a metal‐carbenemigratoryinsertion is reported. The transformation is unique since it involves the formation of multiple bonds in onepot via C−Hfunctionalization and ring opening of oxazolines. Detailed mechanistic investigations reveal interesting
A novel method for the synthesis of β-nitrate ester carboxamides using non-corrosive tert-butyl nitrite (TBN) as the nitro source and easily available oxygen as the oxidant has been developed. Variously substituted 2-oxazolines were efficiently ring-opened to deliver the corresponding products in excellent yields. Notably, this reaction provides fast access to pharmaceuticals such as nicorandil.
Ultrasound-Accelerated, Concise, and Highly Efficient Synthesis of 2-Oxazoline Derivatives Using Heterogenous Calcium Ferrite Nanoparticles and Their DFT Studies
作者:Anjaneyulu Bendi、Shalu Atri、G. B. Dharma Rao、Mohd Jamshaiya Raza、Nutan Sharma
DOI:10.1155/2021/7375058
日期:2021.10.21
rapid and operationally simple approach for synthesising biologically relevant 2-oxazoline derivatives has been developed through highly efficient ultrasound-promoted coupling reactions of thioamides and amino alcohols using calcium ferritenanoparticles as heterogeneous catalysts. The major advantage of using ultrasound irradiation lies in the drastic reduction of reaction time as compared with conventional
使用铁酸钙纳米颗粒作为多相催化剂,通过硫代酰胺和氨基醇的高效超声促进偶联反应,开发了一种快速且操作简单的合成生物相关 2-恶唑啉衍生物的方法。与传统搅拌相比,使用超声波辐射的主要优点在于反应时间的显着减少。此外,已在 DFT/B3LYP/6-311 + G (d, p) 理论水平上对合成的 2-恶唑啉衍生物进行了量子化学研究,以预测优化的几何形状。分子特性,例如键长、键级、美利肯电荷、前沿分子轨道、全局反应性描述符、分子静电势图、
A facile synthesis of 2-oxazolines using a PPh3–DDQ system
作者:Quancai Xu、Zhengning Li
DOI:10.1016/j.tetlet.2009.09.127
日期:2009.12
A facile and efficient synthesis of 2-oxazolines from N-(2-hydroxyethyl)amides using a triphenylphosphine–2,3-dichloro-5,6-dicyanobenzoquinone (PPh3–DQQ) system is described. The reaction proceeds under neutral and mild conditions, and excellent yields are obtained.