A facile synthesis of 5-amino-[1,2,3]triazolo[5,1-a]isoquinoline derivatives through copper-catalyzed cascade reactions
作者:Yunfeng Chen、Shilei Zhou、Shan Ma、Wenqian Liu、Zhiquan Pan、Xiaodong Shi
DOI:10.1039/c3ob41774c
日期:——
A copper-catalyzed cascade method was developed for the synthesis of [1,2,3]triazolo[5,1-a]isoquinoline derivatives. The N-fused heterocycles were obtained in good to excellent yields under mild conditions, which provided a new strategy for the preparation of this highly functionalized building block.
开发了一种铜催化的级联方法,用于合成[1,2,3]三唑并[5,1- a ]异喹啉衍生物。在温和的条件下以高至极好的收率获得了N稠合杂环,这为制备这种高度官能化的结构单元提供了新的策略。
An efficient [3+2] cycloaddition for the synthesis of substituted pyrazolo[1,5-c]quinazolines
作者:Tao Wang、Ailong Shao、Haiyan Feng、Shuwu Yang、Meng Gao、Jun Tian、Aiwen Lei
DOI:10.1016/j.tet.2015.03.019
日期:2015.7
and efficient [3+2] cycloaddition reaction between N-iminoquinazolinium ylide and nitroolefins was developed. From a synthetic point of view, this protocol represents an efficient way to pyrazolo[1,5-c]quinazolines derivatives.
开发了N-亚氨基喹唑啉鎓叶立德和硝基烯烃之间简单有效的[3 + 2]环加成反应。从综合的观点来看,该方案代表了吡唑并[1,5- c ]喹唑啉衍生物的有效方法。
Diversified Synthesis of Furans by Coupling between Enols/1,3-Dicarbonyl Compounds and Nitroolefins: Direct Access to Dioxa[5]helicenes
for the diversifiedsynthesis of furans and arenofurans has been developed that proceeds through K2CO3‐promoted cyclization between enols/1,3‐dicarbonyl compounds and nitroolefins at reflux in EtOH. This facile method has been successfully employed in the synthesis of benzotrifuran derivatives, which are useful hole‐transporting materials. This procedure also provides directaccess to dioxa[5]helicenes
已经开发了一种多样化合成呋喃和槟榔呋喃的通用方法,该方法通过在EtOH中回流,通过K 2 CO 3促进烯醇/ 1,3-二羰基化合物与硝基烯烃之间的环化反应来进行。这种简便的方法已成功用于苯并三呋喃衍生物的合成,苯并三呋喃衍生物是有用的空穴传输材料。该程序还提供了直接接触二氧杂[5]螺旋的方法。该反应提供了广泛的底物范围,使用了廉价的碱和对环境无害的溶剂,并且操作简单。
Three-Component Synthesis of Polysubstituted Pyrroles from α-Diazoketones, Nitroalkenes, and Amines
作者:Deng Hong、Yuanxun Zhu、Yao Li、Xufeng Lin、Ping Lu、Yanguang Wang
DOI:10.1021/ol201891r
日期:2011.9.2
Polysubstituted pyrroles are regiospecifically synthesized via the copper-catalyzed three-component reaction of α-diazoketones, nitroalkenes, and amines under aerobic conditions. The cascade process involves an N–H insertion of carbene, a copper-catalyzed oxidative dehydrogenation of amine, and a [3 + 2] cycloaddition of azomethine ylide.