Rhodium(III)-catalyzedC-H amidation of 2-arylindoles with dioxazolones for the synthesis of indolo[1,2-c]quinazolines is reported. The reaction is compatible with a wide range of electronically diverse 2-arylindoles and dioxazolones, providing indolo[1,2-c]quinazolines in high to excellent yields. Most notably, the combination of this Rh-catalyzed C-H amidation and intramolecular N-H/N-C(O) cyclization
Regioselective Synthesis of Indolo[1,2-<i>c</i>]quinazolines and 11<i>H</i>-Indolo[3,2-<i>c</i>]quinolines via Copper-Catalyzed Cascade Reactions of 2-(2-Bromoaryl)-1<i>H</i>-indoles with Aldehydes and Aqueous Ammonia
作者:Shenghai Guo、Li Tao、Wenwen Zhang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.5b02076
日期:2015.11.6
synthesis of indolo[1,2-c]quinazolines and 11H-indolo[3,2-c]quinolines through copper-catalyzed one-pot cascade reactions of 2-(2-bromoaryl)-1H-indoles with aldehydes and aqueous ammonia has been achieved. Notably, the regioselectivity was easily controlled by tuning the reaction conditions. Compared with literature methods, the present protocol features easily controlled selectivity, readily available starting
吲哚并[1,2-的高度选择性和方便合成Ç ]喹唑啉和11 ħ吲哚并[3,2- c ^ ]喹啉通过铜催化一锅级联反应的2-(2-溴代)-1 ħ -indoles醛和氨水已实现。值得注意的是,通过调节反应条件可以容易地控制区域选择性。与文献方法相比,本方案的特点是易于控制的选择性,易于获得的起始原料,良好的官能团耐受性和简单的操作程序。
Copper-Catalyzed Cascade Synthesis of 1<i>H</i>-Indolo[1,2-<i>c</i>]quinazoline Derivatives
作者:Hao Zhang、Yibao Jin、Hongxia Liu、Yuyang Jiang、Hua Fu
DOI:10.1002/ejoc.201200953
日期:2012.12
A simple, efficient and practical approach to 1H-indolo[1,2-c]quinazolinederivatives has been developed that uses inexpensive and readily-available catalyst and substrates. The method should provide a new strategy for N-fused heterocycles and will show wide application in organic chemistry and medicinal chemistry.