溶剂依赖性铜催化的吲哚基C3-加氧和N1-环化反应:3 H-吲哚-3-酮和吲哚[1,2- c ]喹唑啉的选择性合成
摘要:
通过铜催化的需氧氧化和2-(2-酰氨基芳基)-1 H的分子内环化反应选择性制备3 H-吲哚-3-一和吲哚并[1,2- c ]喹唑啉衍生物的简单实用方法已经公开了在酸存在下的-吲哚。有趣的是,反应结果完全取决于所采用的反应介质。以DMF为溶剂,吲哚底物的酰胺部分可作为助剂,使吲哚的氧化反应与空气中的分子氧作为氧化剂产生3 H-indol-3-one衍生物的选择性很高。另一方面,当反应在1,4-二恶烷中进行时,酰胺部分转变为参与分子内吲哚基N 1-环化,从而提供了吲哚[1,2- c ]喹唑啉作为主要产物。
General and efficient copper-catalyzed aerobic oxidative synthesis of N-fused heterocycles using amino acids as the nitrogen source
作者:Qing Liu、Haijun Yang、Yuyang Jiang、Yufen Zhao、Hua Fu
DOI:10.1039/c3ra41644e
日期:——
efficient copper-catalyzed aerobic oxidative method for the synthesis of N-fused heterocycles has been developed by using readily available α-amino acids as the nitrogen source. The reactions underwent N-arylation, aerobic oxidative dehydrogenation, intramolecular cyclization and dissociation of formic acid. This method should provide a general and practical strategy for the construction of N-fused
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。