Silver-Catalyzed Decarboxylative Radical Addition/Cyclization of Oxamic Acids with Alkenes towards Quinolin-2-ones
作者:Gaofeng Feng、Chengan Jin、Jing-Yao He、Qi-Fan Bai
DOI:10.1055/s-0040-1707891
日期:2020.9
An efficient silver-catalyzed tandem decarboxylative radical addition/cyclization of oxamic acids with alkenes has been developed. This method provides a novel and straightforward protocol toward a variety of 4-aryl-3,4-dihydroquinolin-2(1H)-ones, 4-(α-carbonyl)-3,4-dihydroquinolin-2(1H)-ones, and quinolin-2(1H)-ones in aqueous solution.
Free Radical Cyclization Reactions of Alkylsulfonyl and Alkylthio Substituted Aromatic Amide Derivatives
作者:Yi-Lung Wu、Che-Ping Chuang、Pey-Yun Lin
DOI:10.1016/s0040-4020(00)00580-9
日期:2000.8
Free radical cyclization reactions of alkylsulfonyl and alkylthio substitutedaromatic amide derivatives are described. Carbon radicals can be generated efficiently from the sulfonyl radical induced reaction of allylsulfones or the oxidation of carbonyl compounds with manganese(III) acetate. These radicals undergo either 6-membered or 5-membered ring cyclization onto the aromatic ring effectively and
Fischer,O., Chemische Berichte, 1902, vol. 35, p. 3682
作者:Fischer,O.
DOI:——
日期:——
Direct Phosphonation of Quinolinones and Coumarins Driven by the Photochemical Activity of Substrates and Products
作者:Inwon Kim、Minsik Min、Dahye Kang、Kiho Kim、Sungwoo Hong
DOI:10.1021/acs.orglett.7b00299
日期:2017.3.17
Light-promoted phosphonation of quinolinones and coumarins was developed without the need for an external photocatalyst. Investigations support a mechanism whereby both starting materials and products act as photosensitizers upon excitation using compact fluorescent light sources to photochemically promote the dissociation of the N-O bond in the pyridinium salt by a single electron transfer pathway. A wide range of quinolinone and coumarin substrates can be utilized in the phosphonation process under mild reaction conditions.