A Novel Approach to Both the Enantiomers of Potent Glycosidase Inhibitor Isofagomine via PET-Promoted Cyclization of 1-[Benzyl(trimethylsilyl-methyl)amino]-1,4,5-trideoxy-2,3-O-(1-methylethylidene)-threo-pent-4-ynitol
The firsttotalsynthesis of phomopsolidone A has been accomplished. The key features of the synthesis include the use of a stereoselective Grignard addition reaction, Still–Gennari and acid catalyzed lactonization reactions.
The sesquiterpene lactones cover a diverse and pharmacologically important diversity space. In particular, the electrophilic α-exo-methylene-γ-butyrolactone moiety that is preponderant in this natural product family has been shown to readily engage in covalent inhibition via conjugate addition of cysteine residues in target proteins. However, the synthetic accessibility of sesquiterpenes or related
Fast and efficient synthesis of the complete LL-Z1640-2 framework
作者:Neil Henry、Murray N. Robertson、Rodolfo Marquez
DOI:10.1016/j.tetlet.2007.06.151
日期:2007.8
The convergent synthesis of the complete LL-Z1640-2 framework has been completed. This fast and efficient approach provides flexible access into the resorcyclic lactones. (c) 2007 Elsevier Ltd. All rights reserved.
A general strategy towards the synthesis of 1-N-iminosugar type glycosidase inhibitors: demonstration by the synthesis of d- as well as l-glucose type iminosugars (isofagomines)
作者:Ganesh Pandey、Manmohan Kapur
DOI:10.1016/s0040-4039(00)01553-7
日期:2000.11
Both enantiomers of isofagomine, the potent glycosidase inhibitor of a type 1-N-iminosugar have been synthesized by the intramolecular cyclization of the PET generated alpha -trimethylsilylmethylamine radical cation with the appropriate tethered acetylene moiety. (C) 2000 Published by Elsevier Science Ltd.
An efficient total synthesis of pectinolide H was achieved by using alkynylation, asymmetric reduction in the presence of a Corey-Bakshi-Shibata catalyst, and a Still-Gennari olefination as key steps.