A straightforward approach to a novel class of ribo-type cyclohexenyl nucleosides is described. An electron-demand Diels-Alder reaction forms the key-step of the chosen synthetic pathway. Although the difference is small, conformational analysis using NMR shows that this nucleoside analogue adopts preferentially an 2H3 conformation (S-type), while the “deoxy” cyclohexenyl analogue has a preference for a C3'endo conformation (N- ...
![4,9[1',2']-Benzenonaphtho[2,3-d]-1,3-dioxole, 3a,4,9,9a-tetrahydro-2,2-dimethyl- (en)结构式](https://image.chemsrc.com/caspic/059/82140-93-0.png)
