A new redox-denitration reaction of aromatic nitro compounds
作者:Charles W. Rees、Siu C. Tsoi
DOI:10.1039/a910290f
日期:——
transformed into 4,4-dimethyl-1-phenylpyrazolidin-3,5-dione 10 in which the methylene group has been oxidised and the nitro group has disappeared; two further examples of the same reaction, of pyrazolidinones 4 and 7, are reported together with a mechanistic rationalisation of this curious reaction.
A highly efficient palladium-catalyzed cascade annulation of pyrazolones and aryl iodides to access various benzo[c]cinnoline derivatives has been achieved at 80 °C. A pyridine-type ligand could improve the reaction efficiency under current reaction conditions, giving a higher product yield up to 94%. This novel approach provided a one-pot dual C–H activation strategy with good functional group tolerance
在80°C时,已经实现了高效的钯催化吡唑啉酮和芳基碘的级联环化反应,以得到各种苯并[ c ]肉桂酸衍生物。吡啶类配体可提高当前反应条件下的反应效率,最高收率可达94%。这种新颖的方法提供了具有良好官能团耐受性的一锅双C–H活化策略,例如卤素,甲氧基,硝基,酯,苯酚等。该产物可以很容易地转化为cinnoline衍生物。
Woodruff; Polya, Australian Journal of Chemistry, 1974, vol. 27, p. 2447,2448
作者:Woodruff、Polya
DOI:——
日期:——
DE396507
申请人:——
公开号:——
公开(公告)日:——
Gagnon et al., Canadian Journal of Research, Section B: Chemical Sciences, 1950, vol. 28, p. 720,725