Silver(I)-Mediated CH Amination of 2-Alkenylanilines: Unique Solvent-Dependent Migratory Aptitude
作者:So Won Youn、Tae Yun Ko、Min Jung Jang、Su San Jang
DOI:10.1002/adsc.201400759
日期:2015.1.12
A highly effective silver(I)‐mediated CHamination of 2‐alkenylanilines has been developed to afford a diverse range of substituted indoles. High functional group tolerance, broad substrate scope, simple/fast/high‐yielding reaction, and recovery/reuse of the inexpensive silver oxidant are noteworthy. Furthermore, an uncommon migratory process of β‐monosubstituted 2‐alkenylanilines with solvent‐dependence
A readily accessible and bench-stable water-soluble hypervalent iodine(III) reagent (phenyliodonio)sulfamate (PISA) with an I–N bond was synthesized, and its structure was characterized by X-ray crystallography. With PISA, various indoles were synthesized via C–H amination of 2-alkenylanilines involving an aryl migration/intramolecular cyclization cascade with excellent regioselectivity in aqueous
Intramolecular Cooperative CC Bond Cleavage Reaction of 1,3-Dicarbonyl Compounds with 2-Iodoanilines to Give<i>o</i>-(N-Acylamino)aryl Ketones and Multisubstituted Indoles
作者:Qi Xing、Hui Lv、Chungu Xia、Fuwei Li
DOI:10.1002/chem.201500272
日期:2015.6.1
A copper‐catalyzed CCbondcleavage reaction of 1,3‐dicarbonyl compounds with 2‐iodoanilines was developed. In this process, the ortho effect played an important role in the reactivity and a new reaction pathway that involved a (2‐aminophenyl)‐bis‐(1,3‐dicarbonyl) copper species was clearly observed by a time‐course HRMS analysis of the reaction mixture. Unlike the previous reports, both the nucleophilic
Cesium Carbonate-Promoted Hydroamidation of Alkynes: Enamides, Indoles and the Effect of Iron(III) Chloride
作者:María Teresa Herrero、Jokin Díaz de Sarralde、Raul SanMartin、Laura Bravo、Esther Domínguez
DOI:10.1002/adsc.201200430
日期:2012.11.12
A series of enamide derivatives was prepared by a simple procedure for the hydroamidation of alkynes with amides and sulfonamides. The use of such a mild base as cesium carbonate promotes the latter transformation, and the addition of catalytic amounts of iron(III) chloride has a beneficial effect in the outcome of some of the presented hydroamidation reactions. A range of indoles was also synthesized
通过简单的方法制备了一系列的酰胺衍生物,用于炔烃与酰胺和磺酰胺的加氢酰胺化。使用诸如碳酸铯之类的弱碱可以促进后者的转化,并且催化量的氯化铁(III)的添加在某些所述加氢酰胺化反应的结果中具有有益的作用。还通过两种互补方法从邻-炔基苯胺合成了一系列吲哚,这对于从邻-(2-氨基苯基炔基)苯胺构建吲哚并[1,2- c ]喹唑啉四环体系是有用的。
Regioselective Synthesis of 2-Substituted Indoles from Benzotriazoles and Alkynes by Photoinitiated Denitrogenation
Herein, we describe a photoinitiated and regioselective synthesis of 2-substituted indoles under mild reaction conditions. This biologically privileged scaffold was accessed in good yields from N-aroylbenzotriazoles, a quencher class previously identified using our mechanism-based luminescence screening, and terminal alkynes in the presence of a photocatalyst and blue light irradiation. This straightforward