Cobalt(<scp>iii</scp>)-catalyzed redox-neutral [4+2]-annulation of <i>N</i>-chlorobenzamides/acrylamides with alkylidenecyclopropanes at room temperature
作者:Balu Ramesh、Masilamani Jeganmohan
DOI:10.1039/d1cc00654a
日期:——
An efficient synthesis of substituted 3,4-dihydroisoquinolinones through [4+2]-annulation of N-chlorobenzamides/acrylamides having a monodentate directing group with alkylidenecyclopropanes in the presence of a less expensive, highly abundant and air stable Co(III) catalyst via a C–H activation is demonstrated. In this reaction, the N–Cl bond of N-chlorobenzamide serves as an internal oxidant and thus
HETEROCYCLYL PYRIDYL SULFONAMIDE DERIVATIVES, THEIR MANUFACTURE AND USE AS PHARMACEUTICAL AGENTS
申请人:Brookfield Frederick
公开号:US20100292247A1
公开(公告)日:2010-11-18
Objects of the present invention are the compounds of formula I, their pharmaceutically acceptable salts, enantiomeric forms, diastereoisomers and racemates, the preparation of the above compounds, medicaments containing them and their manufacture, as well as the use of the above compounds in the control or prevention of illnesses such as cancer.
Reverse Regioselective Cp*Co(III)-Catalyzed [4 + 2] C–H Annulation of <i>N</i>-Chloroamides with Vinylsilanes: Synthesis of 4-Silylated Isoquinolones and Their Synthetic Utilities
作者:Arijit Ghosh、Tamanna Rana、Nilanjan Bhaduri、Amit B. Pawar
DOI:10.1021/acs.orglett.3c03115
日期:2023.11.3
have developed a Cp*Co(III)-catalyzed reverse regioselective [4 + 2] annulation of N-chlorobenzamides/acrylamides with vinylsilanes for the synthesis of 4-silylated isoquinolones. The reaction was performed at ambient temperature under redox-neutral conditions. The reaction utilized the N–Cl bond as an internal oxidant, furnished the required products with excellent regioselectivities, and demonstrated
Ru(II)-Catalyzed Regioselective Redox-Neutral [4 + 2] Annulation of <i>N</i>-Chlorobenzamides with 1,3-Diynes at Room Temperature for the Synthesis of Isoquinolones
作者:Arijit Ghosh、Goraksha T. Sapkal、Amit B. Pawar
DOI:10.1021/acs.joc.3c00175
日期:——
Herein, we report Ru(II)-catalyzed C–H/N–H bond functionalization of N-chlorobenzamides with 1,3-diynes via regioselective (4 + 2) annulation for the synthesis of isoquinolones under redox-neutral conditions at roomtemperature. This represents the first example of C–H functionalization of N-chlorobenzamides using an inexpensive and commercially available [Ru(p-cymene)Cl2]2 catalyst. The reaction is
An efficient and straightforward strategy for the synthesis of isoquinolones through [4 + 2]-annulation of N-chlorobenzamides with vinyl acetate in the presence of CoCp*(III) catalyst in a regioselective manner is described. Furthermore, the annulation reaction was diversified by using vinyl ketones. By utilizing this strategy, biologically valuable isoquinolone derivatives were prepared in good yields