Biocatalytical transformations—VI. The 4-acetamido-cyclopent-2-ene carboxylate route revisited: Synthesis of (+)- and (−)-aristeromycin
作者:René Csuk、Petra Dörr
DOI:10.1016/0040-4020(95)00246-5
日期:1995.5
Enantiomerically pure (+)- as well as (−)-aristeromycin can be synthesized starting from (+)- or (−)-butyl (or hexyl) 4-acetamido-cyclopent-2-ene carboxylate; these carboxylates are easily obtained from their corresponding racemates by hydrolysis with the lipase from Candida rugosa.
The synthesis and antiviral activity of racemic carbocyclic 2',3'-dideoxy-3'-fluoro nucleosides are reported. Carbocyclic 2',3'-dideoxy-3'-fluoro nucleosides were obtained from the 3-fluoro cyclopentane derivative 4, which was prepared by two methods. The SN2-displacement of the hydroxyl group of (+/-)-(1 beta, 2 alpha, 3 beta, 4 beta)-4-acetamido-2-fluoro-3-hydroxycyclopentylmethyl acetate (1) with
SYNTHESIS AND BIOLOGICAL EVALUATION OF ENDOCYCLIC 2′,3′-DIDEHYDRO- 2′,3′-DIDEOXYMETHANOCARBA ADENOSINE
作者:Danaè R. Quirk Dorr、Robert Vince
DOI:10.1081/ncn-120015724
日期:2002.12
position of 2',3'-didehydro-2',3'-dideoxy carbocyclic nucleosides. These nucleoside isosteres have been shown to exist in a unique extreme eastern conformation. This prediction was confirmed by x-ray crystallography and high resolution NMR spectroscopy. As expected, the methanocarba adenosine compound was neither a substrate nor an inhibitor of adenosinedeaminase. However, some of the compounds synthesized
Carbocyclic sugar amines: synthesis and stereochemistry of racemic .alpha.- and .beta.- carbocyclic ribofuranosylamine, carbocyclic lyxofuranosylamine, and related compounds