A serendipitous cascade of rhodium vinylcarbenoids with aminochalcones for the synthesis of functionalized quinolines
作者:Kiran Chinthapally、Nicholas P. Massaro、Haylee L. Padgett、Indrajeet Sharma
DOI:10.1039/c7cc07181g
日期:——
A serendipitous five-step cascade of rhodium vinylcarbenoids with aminochalcones enables a unique synthetic approach to highly functionalized tri- and tetra-cyclic quinolines. The cascade reaction begins with the insertion of aminochalcone nitrogen into rhodium vinylcarbenoids followed by intramolecular aldol cyclization to provide a substituted indoline intermediate that undergoes an oxy-Cope rearrangement
copper-catalyzed oxidative amination of 2′-aminoarylketones with methanol as a C1 carbon source and ammonium acetate as an amine source to construct quinazolines was established in a one-pot manner. The reaction conditions are straightforward and highly atom economic to deliver the corresponding quinazolines in high yields with wide functional group tolerance. Importantly, the present method is applicable on a multigram
acridones and their cyclo[b ]‐fused derivatives are efficiently constructed by a double annulation of o ‐enoyl arylisocyanides with α , β ‐unsaturated carbonyls under simple metal‐free condition. This protocol is general, efficient and practical, featuring the successive formation of two rings by a one‐pot domino transformation. A tandem process involing an isocyanide‐based [1+4] cycloaddition, an aminofuran‐based
在简单的无金属条件下,通过邻烯基芳基异氰酸酯与α,β-不饱和羰基的双环化,可以有效地构建各种各样的a烯及其环[ b ]稠合衍生物。该协议是通用,高效和实用的,其特点是通过一锅多米诺骨牌变换连续形成两个环。提出了将异氰酸酯基[1 + 4]环加成,氨基呋喃基分子内[4 + 2]环加成,开环和芳构化等串联过程。
Cu2O-catalyzed cascade phosphinylation/cyclization of 2′-aminochalcones for the synthesis of hemi-indigo derivatives
作者:Xian Liu、Liqiang Hao、Yangyang Wang、Xiao Yu、Zhaoziyuan Yang、Yiping Liu、Yafei Ji
DOI:10.1039/d4ob00594e
日期:——
An efficient Cu2O catalysis of 2′-aminochalcones and diphenylphosphine oxides leading to a series of hemi-indigo derivatives is presented.