Development of an Efficient, Regio- and Stereoselective Route to Libraries Based on the β-d-Glucose Scaffold
摘要:
The design and execution of an efficient synthetic route for the sequential functionalization of the five hydroxyl substituents. of beta -D-glucose has been achieved. This strategy, based on the stereoselective glycosidation of thioglycosides, provides a new approach for the parallel construction of a wide variety of beta -D-glucose analogues and as such holds promise for solid-support library syntheses.
Isolation and synthesis of β-miroside an antifungal furanone glucoside from Prumnopitys ferruginea
作者:Stephen D. Lorimer、Simon D. Mawson、Nigel B. Perry、Rex T. Weavers
DOI:10.1016/0040-4020(95)00352-9
日期:1995.6
The bioactivity-directed isolation and structural determination of β-miroside 3-[(β-D-glucopyranosyloxy)-methyl]-2(5H)-furanone} from the New Zealand gymnosperm Prumnopitysferruginea, is described. Picein 4-(β-D-glucopyranosyloxy)acetophenone} was also isolated. Syntheses of β-miroside, its α-anomer and an isomer with an exocyclic double bond, are described, along with an unusual reaction of an
Biomimetic Synthesis of a Leaf-opening Factor, Potassium Isolespedezate, by Direct Formation of Enol-glycoside
作者:Takanori Sugimoto、Minoru Ueda
DOI:10.1246/cl.2004.976
日期:2004.8
However, 1 was synthesized via an indirect route because of the difficulty of directformation of the enol-glycosidic linkage. More efficiency is desired for the preparation of 1 and 2 which are necessary for the synthesis of probe compounds. In this paper, we report the biomimetic synthesis of 1 containing directformation of an enol-glucosidic linkage. This efficient route makes it possible to prepare
Silyl protected nucleosides possess better biological activity. 2‐O‐silylated nucleosides were synthesized by trans opening of 1,2‐anhydrosugar with nucleobases where HMDS acts both as activating, and silylating agent. Conformational analysis and biofilm inhibition activity of synthesized nucleosides were performed.
Reaction of thiophenol with glucal epoxides: X-ray structure of 3,4,6-tri-O-tert-butyldimethylsilyl-1-S-phenyl-1-thio-α-D-glucopyranoside
作者:Caroline Walford、Sarah L. Heath
DOI:10.1039/a704534d
日期:——
The reaction of the tert-butyldimethylsilyl protected glucal epoxide 1 with thiophenol under a variety of conditions gives three distinct adducts, including the α-phenylthioglycoside 2a, which exists both in solution and in the solid state in a 1C4 conformation in which the C-2, C-3, C-4 and C-5 substituents are all axial.
The diastereoselective addition of organozinc species to 1,2-anhydro sugars in toluene/n-dibutyl ether solvent is reported. Compared to the existing methods, the reaction proceeds at 0 degrees C, and only a slight excess of nucleophile is required to achieve good yields. Scope was assessed with different Omicron-protected glycals along with various nucleophiles (aryl, alkynyl). This methodology was applied to the synthesis of the alpha-anomer of canagliflozin.