Palladium-Catalyzed Amidation and Amination of (Hetero)aryl Chlorides under Homogeneous Conditions Enabled by a Soluble DBU/NaTFA Dual-Base System
作者:Gregory L. Beutner、John R. Coombs、Rebecca A. Green、Bahar Inankur、Dong Lin、Jun Qiu、Frederick Roberts、Eric M. Simmons、Steven R. Wisniewski
DOI:10.1021/acs.oprd.9b00196
日期:2019.8.16
The palladium-catalyzed coupling of aryl and heteroaryl chlorides with primary amides under mild homogeneous reaction conditions is reported. Successful C–N coupling is enabled by the use of a unique “dual-base” system consisting of DBU and NaTFA, which serve as proton acceptor and halide scavenger, respectively, using low catalyst loadings (0.5 mol %) with readily available, air-stable palladium precatalysts
The present invention provides compounds, compositions thereof, and methods of using the same for the targeted degradation of proteins, and the treatment of target protein-mediated disorders.
TsOH·H<sub>2</sub>O-mediated <i>N</i>-amidation of quinoline <i>N</i>-oxides: facile and regioselective synthesis of <i>N</i>-(quinolin-2-yl)amides
An operationally simple method with 100% atom economy has been developed for the synthesis of various N-(quinolin-2-yl)amides via the TsOH·H2O-mediated N-amidation of quinoline N-oxides using inexpensive and commercially available nitriles as the amidation reagents. Mechanistic exploration suggested that the reaction probably proceeds through an acid-assisted 1,3-dipolar cycloaddition and an N–O bond