Efficient synthesis of chiral cyclic acetals by metal and Brønsted acid co-catalyzed enantioselective four-component cascade reactions
作者:Lin Qiu、Xin Guo、Chaoqun Ma、Huang Qiu、Shunying Liu、Liping Yang、Wenhao Hu
DOI:10.1039/c3cc49063g
日期:——
Four-component Mannich reactions subsequently followed by an intramolecular oxo-Michael addition were developed to efficiently produce chiral cyclic acetals with high diastereoselectivity and enantioselectivity.
Diastereoselective Three-Component Cascade Reaction to Construct Oxindole-Fused Spirotetrahydrofurochroman Scaffolds for Drug Discovery
作者:Lin Qiu、Dongwei Wang、Yubing Lei、Lixin Gao、Shunying Liu、Jia Li、Wenhao Hu
DOI:10.1002/ejoc.201600315
日期:2016.5
A one-pot synthesis of new oxindole-fused polycyclic scaffolds is reported. The process involves a three-component [3+2] cycloaddition followed by cyclization through an intramolecular Michaeladdition. The reaction gives easy access to oxindole-fused spirotetrahydrofurochromans in moderate to good yields with high regio- and diastereoselectivity. These compounds could be useful for for drug discovery