具有两个σ-供体/π-受体配体(腈和CO)的自中继铑(I)催化的炔-叠氮化物的环化反应通过串联氮转化和氮杂-Pauson-Khand环化反应依次形成多重稠合杂环系统已开发。在这种方法中,观察到了一种优于CO的有趣的异腈化学选择性插入过程。该反应提供了合成功能化吡咯并[2,3- b ]吲哚支架的替代策略。
C S and C N bond formation via Mn-promoted oxidative cascade reaction: Synthesis of C3-sulfenated indoles
作者:Lin He、Xianwei Li
DOI:10.1016/j.tet.2017.09.003
日期:2017.10
Thioethers are of synthetic value in pharmaceutical molecules and nature products, herein, we report an oxidative cascade reaction that delivers multiple substituted indole thioethers with great efficiency. This transformation utilized ortho-azido aromatic alkynes as the substrates, and sulfonyl hydrazides as the sulfenation reagent promoted by Mn(III) catalyst. Notably, great functional group tolerance
A novel method for the formation of indole derivatives via gold-catalyzed tandem reactions of 2-alkynyl arylazides and oxygen-containing heterocycles has been developed. A variety of indole derivatives were prepared under mild reaction conditions.
An efficient method for the synthesis of 1H-indole-3-sulfonates via Palladium-catalyzed tandemreactions of 2-alkynyl arylazides with sulfonic acids has been developed. The desired products were obtained in good to excellent yields under mild reaction conditions. The reactions were shown to proceed very fast, in most cases, within 10 min.
Synthesis of <i>N</i>
-Fused Seven-Membered Indoline-3-ones <i>via</i>
a Palladium-Catalyzed One-Pot Insertion Reaction from 2-Alkynyl Arylazides and Cyclic <i>β</i>
-Diketones
A novel insertion reaction of cyclic C‐acylimines into cyclic β‐diketones to construct N‐fused seven‐membered multifunctional polycyclic indoline‐3‐one derivatives has been described, which has shown good tolerance of various functional groups. The corresponding products were obtained in moderate to good yields under mild reaction conditions.