CuI/l-Proline-Catalyzed Intramolecular Aryl Amination: An Efficient Route for the Synthesis of 1,4-Benzodiazepinones
作者:K. Majumdar、Sintu Ganai
DOI:10.1055/s-0030-1260975
日期:2011.8
An effective protocol for the synthesis of potentially bio- active benzo(e)chromeno(6,5-b)(1,4)diazepine-3,8(7H,13H)-dione and dibenzo(b,e)(1,4)diazepin-11(10H)-one derivatives in good to excellent yields has been achieved by CuI/L-Proline catalyzed cou- pling reaction as the key step. The methodology offers clean reac- tion conditions and easy isolation of the products in 61-92% yields.
Metal and phosgene-free synthesis of 1H-quinazoline-2,4-diones by selenium-catalyzed carbonylation of o-nitrobenzamides
作者:Xiaowei Wu、Zhengkun Yu
DOI:10.1016/j.tetlet.2010.01.040
日期:2010.3
were efficiently synthesized by selenium-catalyzed carbonylation of o-nitrobenzamides under relatively mild conditions. In situ-generated carbonyl selenide (SeCO) is proposed to initiate the catalytic carbonylation. Thus, a concise transition metal and phosgene-free synthetic route to potentially bioactive-substituted 1H-quinazoline-2,4-dione derivatives has been developed.
widely used in preparative organic syntheses. As copper production has recently exceeded a yearly amount of 20 million tons, using minerals instead of pure copper compounds can lower the need for such processes and can lead to more economical and environmentally friendly procedures. Such a method is the subject of our present study in which the preparation of 2-substituted benzoxazoles and benzothiazoles
Deep eutectic solvent mediated synthesis of quinazolinones and dihydroquinazolinones: synthesis of natural products and drugs
作者:Suman Kr Ghosh、Rajagopal Nagarajan
DOI:10.1039/c6ra00855k
日期:——
A mild and greener protocol was developed to synthesize substituted quinazolinones and dihydroquinazolinonesviadeep eutectic solvent mediated cyclization with aliphatic, aromatic, and heteroaromatic aldehydes in good to excellent yields.