Palladium-catalyzed double allylic alkylation of indole-2-hydroxamates: easy access to pyrazino[1,2-a]indole derivatives
作者:Sébastien Laliberté、Peter K. Dornan、Austin Chen
DOI:10.1016/j.tetlet.2009.11.031
日期:2010.1
The synthesis of pyrazino[1,2-a]indoles via a palladium-catalyzed double allylic alkylation of indole-2-hydroxamates is described. The reaction conditions are very mild and allow for a wide variety of substitutions on the indole core.
描述了通过钯催化的吲哚-2-异羟肟酸酯的双烯丙基烷基化反应合成吡嗪并[1,2- a ]吲哚。反应条件非常温和,并允许在吲哚核上进行各种各样的取代。
Iron(III)-Catalyzed (4 + 2)-Cycloannulation of 2-Hydroxy Ketoxime Ethers with Indol-2-ylamides: Synthesis of Indole-Fused 2-Piperidinones
作者:Marcel Schlegel、Christoph Schneider
DOI:10.1021/acs.joc.9b00261
日期:2019.5.3
A highly regio- and diastereoselective (4 + 2)-cycloannulation process of indanone-derived 2-hydroxy ketoxime ethers with 1,4-bisnucleophilic indol-2-ylamides has been developed. In the presence of 5 mol % FeCl3, densely functionalized 2-piperidinones containing two new σ-bonds and two vicinal quaternary stereogenic centers were formed under mild reaction conditions in a one-pot operation. Moreover
Herein, an efficient and regioselective Rh(III)‐catalyzed [4+2] annulation/lactonization cascade of indoles with 4‐hydroxy‐2‐alkynoates at room temperature to access the furo[3′,4′:4,5]pyrimido[1,6‐a ]indole‐1,5(3H ,4H )‐diones is described. This method features mild reaction conditions, operational simplicity, excellent regioselectivity, broad substrate scope with good functional group tolerance,
本文中,在室温下高效和区域选择性的Rh(III)催化吲哚的[4 + 2]环化/内酯化级联反应,其具有4-羟基-2-链烷酸酯,可进入呋喃[3',4':4,5]嘧啶描述了[ 1,6 - a ]吲哚-1,5 (3 H,4 H)-二酮。该方法的特点是反应条件温和,操作简便,区域选择性出色,底物范围广,具有良好的官能团耐受性以及良好的产率。