Molecular Diversity of Three-Component Reactions of Aromatic Aldehydes, Arylamines, and Acetylenedicarboxylates
作者:Jing Sun、Qun Wu、Er-Yan Xia、Chao-Guo Yan
DOI:10.1002/ejoc.201100008
日期:2011.6
The three-componentreactions of aromaticaldehydes, arylamines, and acetylenedicarboxylates show very interesting moleculardiversity. In an aqueous ethanol solution the three-componentreaction gave polysubstituted 2-hydroxyhydropyridines. In absolute ethanol 1,4-dihydropyridines were produced in satisfactory yields. Finally, under acid catalysis, this three-componentreaction afforded polysubstituted
Highly functionalized pyrrolidine-2,3-diones can be synthesized efficiently and stereoselectively under mild conditions using a biocatalytic approach. The reaction led to the formation of new all-carbon quaternary stereocenters from Myceliophthora thermophila laccase (Novozym 51003) catalyzed oxidation of catechols to ortho-quinones and subsequent 1,4-addition with 3-hydroxy-1,5-dihydro-2H-pyrrol-2-ones
高度功能化的吡咯烷-2,3-二酮可以在温和条件下使用生物催化方法高效且立体选择性地合成。该反应导致嗜热毁丝霉漆酶 (Novozym 51003) 形成新的全碳季立体中心,催化儿茶酚氧化为邻苯二酚,随后与 3-hydroxy-1,5-dihydro-2 H -进行 1,4-加成反应吡咯-2-一。该反应是在两种反应物上使用不同的取代基进行的,产生了 13 种中等至良好产率 (42–91%) 的产物。同样的 15 个反应也用 K 3 Fe(CN) 6作为催化剂进行了测试,但这里只有一个反应产生了产物(60% 收率)。