Question

One-pot synthesis of hydrophobically modified iminosugar c-alkynylglycosides: facile synthesis of polyhydroxy tetrahydroindolizines

Answer 1

Abstract

A facile one‐pot synthesis route to spirooxindole derivatives was developed by combining the three types of catalytic activities of lipase from porcine pancreas (PPL) in the presence of water, i.e., the Knoevengel condensation, Michael addition and cyclization. PPL showed excellent catalytic activity and have a good adaptability to different substrates in the reaction. All the reactions go smoothly and provide spirooxindole derivatives with high yield under the mild conditions. This lipase‐catalyzed multistep conversion method has provided a new strategy to synthesize spirooxindole derivatives and expanded the application of biocatalysts.