Development of an Efficient Procedure for Indole Ring Synthesis from 2-Ethynylaniline Derivatives Catalyzed by Cu(II) Salts and Its Application to Natural Product Synthesis
作者:Kou Hiroya、Shin Itoh、Takao Sakamoto
DOI:10.1021/jo035528b
日期:2004.2.1
The development of efficient methods for the indole synthesis catalyzed by Cu(II) salts and its applications were investigated. Cu(OAc)2 has been proved to be the best catalyst for the synthesis of various 1-p-tolylsulfonyl or 1-methylsulfonylindoles, which have both electron-withdrawing and electron-donating groups on the aromatic ring and C2 position of indoles. For the primary aniline derivatives
Catalytic Enantioselective Synthesis of Amino Skipped Diynes
作者:Paulo H. S. Paioti、Khalil A. Abboud、Aaron Aponick
DOI:10.1021/jacs.5b13387
日期:2016.2.24
The Cu-catalyzed synthesis of nonracemic 3-amino skipped diynes via an enantiodetermining C-C bond formation is described using StackPhos as ligand. Despite challenging issues of reactivity and stereoselectivity inherent to these chiral skipped diynes, the reaction tolerates an extremely broad substrate scope with respect to all components and provides the title compounds in excellent enantiomeric
使用 StackPhos 作为配体描述了通过对映确定 CC 键形成的非外消旋 3-氨基跳跃二炔的 Cu 催化合成。尽管这些手性跳跃二炔固有的反应性和立体选择性具有挑战性问题,但该反应对所有组分的底物范围非常广泛,并提供了极好的对映体过量的标题化合物。这里证明炔部分是有用的合成手柄,3-氨基跳过的二炔是对映选择性合成的方便构建块。
A Robust, Well-Defined Homogeneous Silver(I) Catalyst for Mild Intramolecular Hydroamination of 2-Ethynylanilines Leading to Indoles
作者:James McNulty、Kunal Keskar
DOI:10.1002/ejoc.201301368
日期:2014.3
A highly efficient, chemically stable and well-definedhomogeneoussilver(I) catalyst is reported for the room temperature, intramolecularhydroamination of 2-alkynylanilines leading to indole derivatives.
Synthesis of Indoles via Diethylzinc-Mediated Intramolecular Hydroamination Reactions of Alkynyl Sulfonamides
作者:Gang Zhao、Yan Yin、Zhuo Chai、Wen-Ying Ma
DOI:10.1055/s-0028-1083236
日期:2008.12
A series of indole derivatives were synthesized through the intramolecular hydroamination of alkynyl sulfonamides using 20 mol% of diethylzinc as the catalyst. A tandem cyclization-nucleophilic addition reaction was also possible to afford C2,C3-disubstituted indoles using 120 mol% of diethylzinc.
Catalytic Cascade Cyclization and Regioselective Hydroheteroarylation of Unactivated Alkenes
作者:Rahul K. Shukla、Atul K. Chaturvedi、Chandra M. R. Volla
DOI:10.1021/acscatal.1c01234
日期:2021.7.2
A Pd(II)-catalyzed directed, regio-controlled hydroheteroarylation of unactivatedalkenes via a cascade intramolecular amino/oxy/carbo-palladation of alkynes followed by cis-migratory insertion of alkenes has been developed for the construction of γ-heteroaryl-substituted carbonyl compounds. 8-Aminoquinoline was employed as a cleavable bidentate directing group to stabilize the nucleopalladated vinylpalladium(II)
通过炔烃的级联分子内氨基/氧/碳钯化,然后顺式迁移插入烯烃,未活化烯烃的 Pd(II) 催化定向、区域控制的氢杂芳基化已被开发用于构建γ-杂芳基取代的羰基化合物。8-氨基喹啉用作可切割的双齿导向基团以稳定核钯化乙烯基钯 (II) 中间体,并控制碳钯化步骤的区域选择性。使用 5 mol % Pd(OAc) 2在操作简单的条件下进行反应序列在六氟异丙醇中,并与各种亲核试剂相容,以提供结构不同的杂环骨架,包括吲哚、色烯、1,4-恶嗪、1,3-恶嗪、吡咯、异色酮和螺环己二酮。通过对药物和天然产物进行克级合成、指导基团去除和后期修饰,进一步证明了该方法的合成效用。对照研究表明,在活化的烯烃存在下,碳钯化对未活化的烯烃具有选择性。