None of these selected derivatives showed significant acute toxicity against MRC-5 cells or early signs of genotoxicity in the Vitotox™ assay at the active concentration range. The structure activity study relation provided some insight in the further favourable substitution pattern at the 4-hydroxyquinolin-2(1H)-one scaffold and finally 6-fluoro-4-hydroxy-3-phenylquinolin-2(1H)-one (38) was selected as
Cu(i)-catalyzed chemical fixation of CO2 with 2-alkynylaniline into 4-hydroxyquinolin-2(1H)-one
作者:Chun-Xiao Guo、Wen-Zhen Zhang、Si Liu、Xiao-Bing Lu
DOI:10.1039/c3cy00858d
日期:——
copper(I) catalyzed reaction of 2-alkynylaniline with CO2 using DBU as base to produce 4-hydroxyquinolin-2(1H)-one derivatives in moderate to good yield is presented. In this reaction, a unique bond cleavage pattern for CO2 was observed that one of the C–O double bonds of CO2 was totally broken and rearranged into two moieties in the absence of the reductive reagent. This efficient reaction system showed
3-Substituted 4-hydroxy-2(1 H)-quinolones 3, 5, 7 are halogenated with bromine or sulfuryl chloride to yield the quinolinediones 9 or 10. Reaction of 3, 5, 7 with chloroform gives the dichloromethyl quinolinediones 11. Halogen exchange leads from the chloro quinolinediones 10 to fluoro quinolinedones 12 and to azido quinolinediones 13. Similarly the dichloro quinolinedione 10 an reacts to the difluoro quinolinedione 14, which is reduced to the 3-fluoro-4-hydroxyquinolone 16 and reacts again with sulfuryl chloride to give the mixed 3-chloro-3-fluoroquinolinedione 15.
STADLBAUER, W.;KAPPE, TH., MONATSH. CHEM., 1985, 116, N 8-9, 1005-1015
作者:STADLBAUER, W.、KAPPE, TH.
DOI:——
日期:——
Efficient Preparation of 4-Hydroxyquinolin-2(1<i>H</i>)-one Derivatives with Silver-Catalyzed Carbon Dioxide Incorporation and Intramolecular Rearrangement
作者:Tomonobu Ishida、Satoshi Kikuchi、Tohru Yamada
DOI:10.1021/ol401571r
日期:2013.7.19
Although 4-hydroxyquinolin-2(1H)-one derivatives have attracted much attention due to their biological benefits, conventional reactions under harsh heat conditions must be employed to provide these key compounds. In the presence of a catalytic amount of silver salt, various o-alkynylanilines were treated with carbon dioxide and a base under mild reaction conditions to afford the corresponding 4-hy