Synthesis of antiviral nucleosides from crotonaldehyde. Part 3.1,2 total synthesis of didehydrodideoxythymidine (d4T)
摘要:
The total synthesis of the antiviral agent d4T 3 from the epoxyalcohol 2, itself derived from crotonaldehyde 1, in 6 steps and 18% overall yield is described.
The present invention relates to nucleoside diphosphate mimics and nucleoside triphosphate mimics, which contain diphosphate or triphosphate moiety mimics and optionally sugar-modifications and/or base-modifications. The nucleotide mimics of the present invention, in a form of a pharmaceutically acceptable salt, a pharmaceutically acceptable prodrug, or a pharmaceutical formulation, are useful as antiviral, antimicrobial, and anticancer agents. The present invention provides a method for the treatment of viral infections, microbial infections, and proliferative disorders. The present invention also relates to pharmaceutical compositions comprising the compounds of the present invention optionally in combination with other pharmaceutically active agents.
Dehydrative Glycosylation with Activated Diphenyl Sulfonium Reagents. Scope, Mode of <i>C</i>(1)-Hemiacetal Activation, and Detection of Reactive Glycosyl Intermediates
作者:Brian A. Garcia、David Y. Gin
DOI:10.1021/ja993595a
日期:2000.5.1
The development of a method for direct dehydrative glycosylations with 1-hydroxyglycosyl donors employing the reagent combination of triflic anhydride and diphenylsulfoxide is described. The one-pot coupling method is a facile process which is applicable to a variety of carbohydrate coupling partners. Oxygen-18-labeling studies are consistent with the first step in carbohydrate activation being the
Ring-opening reactions of functionalized 1,2-cyclic sulfates and oxetanes with the phosphonodifluoromethyl carbanion are reported. This approach allows an easy access to fluorinated beta-hydroxyphosphonates that are building blocks in the synthesis of acyclic nucleosides. Synthesis of precursors of nucleoside phosphorylase inhibitors from these alcohols is described.
Facile, highly stereoselective synthesis of 2′,3′-dideoxy- and 2′,3′-didehydro-2′,3t'-dideoxy nucleosides via a furanoid glycal intermediate
作者:Choung Un Kim、Peter F. Misco
DOI:10.1016/0040-4039(92)89018-8
日期:1992.9
Regiospecific and highlyStereoselective electrophilic addition reactions to the furanoid glycal 10 have been used as key steps in the synthesis of ddA and d4T antiviral nucleosides.
applicable to oligonucleotide therapeutics, we designed a 4′-thio analogue of an LNA/BNA monomer. Synthesis of 4′-hydroxymethyl-4′-thioribonucleoside was achieved by a tandem ring-contraction-aldol reaction of a 5-thiopyranose derivative and the subsequent Pummerer-type thioglycosylation reaction of the corresponding sulfoxide. Treatment of 4′-hydroxymethyl-4′-thiopyrimidine nucleosides with diphenyl