Conversion of (–)-4-hydroxy-2-oxabicyclo[3.3.0]oct-7-en-3-one into the anti-HIV agent carbovir
作者:Rosemary A. MacKeith、Ray McCague、Horacio F. Olivo、Christopher F. Palmer、Stanley M. Roberts
DOI:10.1039/p19930000313
日期:——
The lactone (±)-1 was resolved using Pseudomonas fluorescens lipase and vinyl acetate; the ester (–)-3 obtained by this process was subsequently converted into the anti-HIVagentcarbovir (–)-9.
Practical enantiodivergent syntheses of both enantiomers of carbovir, 1592U89 and six-membered ring analogues
作者:Horacio F. Olivo、Jiaxin Yu
DOI:10.1039/a708261d
日期:——
The hydroxylactones 4a–b (both available in optically pure form from biocatalytic processes) have been used in the preparation of carbovir, 1592U89, and their six-membered ring analogues.
[formula: see text] An efficient solid-phasesynthesis of carbocyclic nucleosides has been developed. The key step is the palladium-catalyzed coupling of a purine derivative to a resin-bound allylic benzoate. The resulting products may be further functionalized on the solid phase. Acidic cleavage affords carbocyclic nucleosides, a class of compounds with demonstrated biological activity and substantial
An Efficient, General Asymmetric Synthesis of Carbocyclic Nucleosides: Application of an Asymmetric Aldol/Ring-Closing Metathesis Strategy
作者:Michael T. Crimmins、Bryan W. King、William J. Zuercher、Allison L. Choy
DOI:10.1021/jo005535p
日期:2000.12.1
A general and efficient synthesis of carbocyclic and hexenopyranosyl nucleosides has been developed. The strategy combines three key transformations: an asymmetric aldol addition to establish the relative and absolute configuration of the pseudosugar, a ring-closing metathesis to construct the pseudosugar ring, and a Trost-type palladium(0)-mediated substitution to assemble the pseudosugar and the
Facile conversion of 4-endo-hydroxy-2-oxabicyclo[3.3.0]oct-7-en-3-one into carbocyclic 2′-deoxyribonucleoside analogues
作者:Anupma Dhanda、Lars J. S. Knutsen、May-Britt Nielsen、Stanley M. Roberts、David R. Varley
DOI:10.1039/a906464h
日期:——
furnish the bromoacetates 14–18 in good yields. A plausible explanation for the observed selectivity is proposed. Hydrodebromination of compounds 14, 17, 18 and 19 provided the corresponding 2′-deoxyribonucleosideanalogues 20–23.