Reductive Alkylation of Quinolines to <i>N</i>-Alkyl Tetrahydroquinolines Catalyzed by Arylboronic Acid
作者:Priyanka Adhikari、Dipanjan Bhattacharyya、Sekhar Nandi、Pavan K. Kancharla、Animesh Das
DOI:10.1021/acs.orglett.1c00302
日期:2021.4.2
A boronic acid catalyzed one-pot tandem reduction of quinolines to tetrahydroquinolines followed by reductivealkylation by the aldehyde has been demonstrated. This step-economcial synthesis of N-alkyl tetrahydroquinolines has been achieved directly from readily available quinolines, aldehydes, and Hantzsch ester under mild reaction conditions. The mechanistic study demonstrates the unique behavior
Access to <i>gem</i>-Difluoro Olefins via C–H Functionalization and Dual Role of Anilines
作者:Zhen Yang、Chao Pei、Rene M. Koenigs
DOI:10.1021/acs.orglett.0c02568
日期:2020.9.18
In this Letter, we describe a simple, practical approach in which cheap CuI was used as a catalyst to introduce a gem-difluoro olefin onto simple electron-rich aniline derivatives in good yield via direct C–H functionalization and a subsequent HF elimination reaction. Detailed mechanistic studies point at a dual role of aniline derivatives in this reaction, which serve as a substrate and a basic promoter
Highly Chemoselective Reductive Amination of Carbonyl Compounds Promoted by InCl<sub>3</sub>/Et<sub>3</sub>SiH/MeOH System
作者:On-Yi Lee、Ka-Lun Law、Chun-Yu Ho、Dan Yang
DOI:10.1021/jo8016082
日期:2008.11.21
A new strategy has been developed for reductiveamination of aldehydes and ketones with the InCl3/Et3SiH/MeOH system, which is a nontoxic system with highlychemoselective and nonwater sensitive properties. The methodology can be applied to a variety of cyclic, acyclic, aromatic, and aliphatic amines. Functionalities including ester, hydroxyl, carboxylic acid, and olefin are found to be stable under