Photochemically Induced Synthesis of the Topoisomerase I Inhibitors Indeno[1,2-c]isoquinoline-5,11-diones
摘要:
A convenient synthesis of indeno[1,2-c]isoquinoline-5,11-diones has been achieved using combinational photochemical and carbocationic cyclization tactics. The synthetic route involved first the construction of adequately functionalized N-styryl benzamides via Suzuki-Miyaura cross-coupling reaction with enol phosphate combined with a six-p-electron photocyclization process. The assembling of the title compounds was readily ensured through sequential carbocationic annulation reaction and ultimate oxidation of a latent hydroxy functionality.
Highly Efficient Copper-Catalyzed Amidation of Benzylic Hydrocarbons Under Neutral Conditions
作者:Eva-Louise Howard、Norman Guzzardi、Viliyana G. Tsanova、Angeliki Stika、Bhaven Patel
DOI:10.1002/ejoc.201701759
日期:2018.2.14
A ligand free method has been developed for the amidation of benzylichydrocarbons. A range of benzylicamides has been prepared with the use of dicumyl peroxide and a copper catalyst in good to excellent yields.
Mo(CO)<sub>6</sub>-Mediated Carbamoylation of Aryl Halides
作者:Wei Ren、Motoki Yamane
DOI:10.1021/jo101611g
日期:2010.12.17
A simple method for the synthesis of amides has been developed by molybdenum-mediated carbamoylation of aryl halides. Whereas the conventional palladium-catalyzed three-component coupling reaction requires a large excess of gaseous carbonmonoxide, the incorporation of carbonmonoxide in this Mo-mediated carbamoylation reaction is so efficient that it requires only a slight excess amount of carbon monoxide
Efficient and Selective Hydrosilylation of Secondary and Tertiary Amides Catalyzed by an Iridium(III) Metallacycle: Development and Mechanistic Investigation
Readily accessible cationic IrIII metallacycles catalyze efficiently the chemoselective hydrosilylation of tertiary and secondaryamides to amines. The catalyst described herein operates at low loadings using inexpensive 1,1,3,3-tetramethyldisiloxane and allows fast reactions with high yields, selectivities, and turnover numbers. A transient iminium intermediate has been observed for the first time
Carbamoylation of Aryl Halides by Molybdenum or Tungsten Carbonyl Amine Complexes
作者:Wei Ren、Motoki Yamane
DOI:10.1021/jo1002592
日期:2010.5.7
When aryl halide is treated with molybdenumcarbonyl amine complex in the presence of base, carbamoylation proceeds to give amide in good yield. The proposed mechanism involves oxidativeaddition of aryl halide to molybdenum(0) complex, migratory insertion to carbon monoxide giving acyl(amino)molybdenum(II) or aryl(carbamoyl)molybdenum(II) intermediate, and reductive elimination of the amide. This
Diboron-Catalyzed Dehydrative Amidation of Aromatic Carboxylic Acids with Amines
作者:Dinesh N. Sawant、Dattatraya B. Bagal、Saeko Ogawa、Kaliyamoorthy Selvam、Susumu Saito
DOI:10.1021/acs.orglett.8b01480
日期:2018.8.3
are herein reported as new catalysts for the synthesis of aryl amides by catalytic condensation of aromatic carboxylicacids with amines. The developed protocol is both simple and highly efficient over a broad range of substrates. This method thus represents an attractive approach for the use of diboron catalysts in the synthesis of amides without having to resort to stoichiometric or additional dehydrating