Rhodium-Mediated Dipolar Cycloaddition of Diazoquinolinediones
摘要:
As an entry to furoquinoline structures of natural origin, the rhodium-mediated dipolar cycloaddition of diazoquinolinediones with alkenes and alkynes has been examined. Because of the unsymmetrical nature of the diazo compounds, both linear and angular furoquinoline products are possible. For the most part, a mixture of regioisomers is generated in moderate to good yields, though in a few cases dominant products are obtained in high yields. The products can be further converted to naturally occurring alkaloids such as isodictamnine. A novel observation in this work is that catalytic quantities of acid enhance the yield and regiochemical control in the cycloaddition.
One-pot construction of diverse and functionalized isochromenoquinolinediones by Rh(<scp>iii</scp>)-catalyzed annulation of unprotected arylamides with 3-diazoquinolinediones and their application for fluorescence sensor
作者:Rajeev Shrestha、Hari Datta Khanal、Yong Rok Lee
DOI:10.1039/c9ra03146d
日期:——
efficient Rh(III)-catalyzed annulation of arylamides with 3-diazoquinolinediones for the construction of diverse and highly functionalized isochromenoquinolinediones is described. Furthermore, the methodology is applicable for delivering various relevant molecules such as pyridopyranoquinolindiones, thienopyranoquinolinones, and indolopyranoquinolinone. The reaction proceeds viacascadeC–Hactivation, carbene
描述了一种简便高效的 Rh( III ) 催化芳基酰胺与 3-重氮喹啉二酮的环化,用于构建多种高度功能化的异色烯喹啉二酮。此外,该方法适用于传递各种相关分子,如吡喃并吡喃喹啉二酮、噻吩并吡喃喹啉酮和吲哚吡喃喹啉酮。该反应通过级联 C-H 活化、卡宾插入和分子内内酯化进行。该反应具有高原子经济性、良好的官能团耐受性和高区域选择性。合成的化合物还可以作为 Fe 3+离子的有效荧光传感器。