One-Pot Synthesis of Structurally Diverse Iminosugar-Based Hybrid Molecules
2018
A one-pot
iminium-ion-based strategy has been developed for the synthesis of structurally novel
iminosugar-based hybrid molecules.
Iminiumion derived from l-
rhamnose
lactol-
mesylatereacted with electron-rich aromatic systems in an inter/intra molecular fashion to furnish
pyrrolidine-based
iminosugarC-aryl glycosides with a high degree of stereoselectivity.
Iminiumion also reacted readily with active methylene compounds such as
4-hydroxycoumarin, 4-hydroxyquinolinone, and
lawsoneto provide
iminosugarC-coumarin/quinolinone/naphthoquinonyl glycosides in very good yields.
Azomethine ylidegenerated from an
iminiumion derivative underwent dipolar cycloaddition reaction with 1,4-quinones to furnish novel isopyrrolonaphtho/anthroquinon-based
iminosugar-hybrids. The preliminary cytotoxic activities of some of the synthesized
iminosugar-hybrids have been assayed against various human cancer cell lines and some of the hybrid molecules exhibited promising anticancer activities.
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