Asymmetric Organocatalytic Approach to 2,4-Disubstituted 1,2,3-Triazoles by N2-Selective Aza-Michael Addition
作者:Ujjawal Kumar Bhagat、Rama Krishna Peddinti
DOI:10.1021/acs.joc.7b02793
日期:2018.1.19
of this reaction have only recently been developed. Nevertheless, functionalization at the N2-position of NH-1,2,3-triazoles leading to opticallyactive N2-substituted triazoles is not yet developed. In this article, we report, for the first time, the asymmetric aza-Michael reaction of 4-aryl-NH-1,2,3-triazoles to cyclic enones under the catalytic influence of chiral bifunctional thiourea organocatalysts
尽管N个N1-官能^ h -1,2,3-三唑已经知道了几十年,这种反应的对映选择性变种最近才开发的。然而,尚未开发出在N H -1,2,3-三唑的N2-位上的官能化导致光学活性的N2-取代的三唑。在本文中,我们首次报道了在手性双官能硫脲有机催化剂的催化作用下,4-芳基-N H -1,2,3-三唑与环烯酮的不对称氮杂-迈克尔反应,生成对映体。 2,4-二取代的1,2,3-三唑。辛可宁衍生的硫脲催化剂III 在当前的转换中有效地工作,以生产N2官能化的1,2,3-三唑为主要产品,光学收率高达> 99.9%,以及次要的1,4-二取代的1,2,3-三唑。
Compounds and methods
申请人:——
公开号:US20030220371A1
公开(公告)日:2003-11-27
Compounds of this invention are non-peptide, reversible inhibitors of type 2 methionine aminopeptidase, useful in treating conditions mediated by angiogenesis, such as cancer, haemangioma, proliferative retinophathy, rheumatoid arthritis, atherosclerotic neovascularization, psoriasis, ocular neovascularization and obesity.
Cu-Catalyzed Site-Selective and Enantioselective Ring Opening of Cyclic Diaryliodoniums with 1,2,3-Triazoles
作者:Zengyin Chao、Mingming Ma、Zhenhua Gu
DOI:10.1021/acs.orglett.0c02256
日期:2020.8.21
A Cu-catalyzed enantioselective ring-opening/triazolylation reaction is reported. The reaction shows excellent chemoselectivity regarding the three different nitrogen atoms of 1,2,3-triazoles. The optically enriched axially chiral aryl iodides thus obtained were readily derivatized to different types of chiral phosphine ligands and their corresponding copper or palladium complexes.
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。
One-Pot Synthesis of 4-Aryl-<i>NH</i>-1,2,3-Triazoles through Three-Component Reaction of Aldehydes, Nitroalkanes and NaN<sub>3</sub>
A one‐pot three‐component reaction of aldehydes, nitroalkanes and NaN3 for the synthesis of NH‐1,2,3‐triazoles has been developed. The reaction provides a safe, efficient and step‐economic approach for the synthesis of various NH‐1,2,3‐triazoles in good to excellent yields.