Synthesis of the Disubstituted Maleic Anhydride Frame Using a Novel Tandem Radical-Polar Reaction
作者:Mariella Pattarozzi、Franco Ghelfi、Fabrizio Roncaglia、Ugo Pagnoni、Andrew Parsons
DOI:10.1055/s-0029-1217569
日期:2009.8
S-acetals, which evolves as a tandem radical-polar process, is described. The reaction, which is carried out in the presence of a Cu(I) complex catalyst (10 mol%) and an inorganic base (i.e., carbonate), can be exploited as the key step for a novel, short, and versatile synthesis of the 3,4-disubstituted maleic anhydride nucleus.
描述了一种未报道的环状 N-α-二氯酰基-烯酮-N,S-缩醛的 5-endo-trig 原子转移自由基环化,该反应演变为串联自由基-极性过程。该反应在 Cu(I) 配合物催化剂 (10 mol%) 和无机碱 (即碳酸盐) 存在下进行,可作为新型、短、多功能合成的关键步骤。 3,4-二取代的马来酸酐核。