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
[EN] TWO PART CURABLE COMPOSITIONS<br/>[FR] COMPOSITIONS DURCISSABLES EN DEUX PARTIES
申请人:HENKEL IP & HOLDING GMBH
公开号:WO2021127128A1
公开(公告)日:2021-06-24
Two part curable compositions are provided which include a first part comprising a (meth)acrylate component and an amine and a second part comprising a fatty acid peroxide. Further disclosed are methods of preparing a two part adhesive composition using the two part curable compositions and methods of bonding surfaces using the two part curable compositions.
Cyclometalated Ruthenium Catalyst Enables Selective Oxidation of <i>N</i>-Substituted Tetrahydroquinolines to Lactams
作者:Monuranjan Konwar、Tapashi Das、Animesh Das
DOI:10.1021/acs.orglett.3c04263
日期:2024.2.16
Herein, we report an unusual α-methylene oxidation of N-substituted tetrahydroquinoline to lactams using the cyclometalated Ru(II)-complex as a catalyst. Cyclic-α-methylene C–H bonds are selectively oxidized under the reaction conditions even in the presence of α-methyl or reactive α-methylene C–H bonds. This methodology is also useful in the late-stage functionalization of pharmaceuticals. Mechanistic