Scandium-Catalyzed Preparation of Cytotoxic 3-Functionalized Quinolin-2-ones: Regioselective Ring Enlargement of Isatins or Imino Isatins
作者:Benito Alcaide、Pedro Almendros、Cristina Aragoncillo、Gonzalo Gómez-Campillos、Manuel Arnó、Luis R. Domingo
DOI:10.1002/cplu.201200090
日期:2012.7
the presence of catalytic amounts of Sc(OTf)3 smoothly promotes the ring expansion of isatins or imino isatins to efficiently afford 3‐functionalized quinolin‐2‐ones through controlled ring enlargement. Whereas the ring‐expansion reaction of azetidine‐2,3‐diones led to the adduct resulting from migration of the carbonyl group, the ring‐expansion reaction of oxindole derivatives gave the adduct resulting
在催化量的Sc(OTf)3存在下的三甲基甲硅烷基重氮甲烷可平滑地促进isatins或imino isatins的扩环,从而通过控制环的扩环有效地提供3官能化的喹啉-2-酮。氮杂环丁烷-2,3-二酮的扩环反应导致羰基迁移产生加合物,而羟吲哚衍生物的扩环反应则导致芳基迁移导致加合物。为了使实验观察合理化,已经进行了理论研究。此外,已经在四种癌细胞系中评估了一些合成的杂环的生物活性。