[EN] PREPARATION OF 2'FLUORO-2'- ALKYL- SUBSTITUTED OR OTHER OPTIONALLY SUBSTITUTED RIBOFURANOSYL PYRIMIDINES AND PURINES AND THEIR DERIVATIVES [FR] PREPARATION DE RIBOFURANOSYLE PYRIMIDINES ET PURINES A SUBSTITUTION 2'-FLUORO-2'- ALKYL- OU EVENTUELLEMENT A AUTRE SUBSTITUTION AINSI QUE DERIVES DE CELLES-CI
[EN] PREPARATION OF 2'FLUORO-2'- ALKYL- SUBSTITUTED OR OTHER OPTIONALLY SUBSTITUTED RIBOFURANOSYL PYRIMIDINES AND PURINES AND THEIR DERIVATIVES [FR] PREPARATION DE RIBOFURANOSYLE PYRIMIDINES ET PURINES A SUBSTITUTION 2'-FLUORO-2'- ALKYL- OU EVENTUELLEMENT A AUTRE SUBSTITUTION AINSI QUE DERIVES DE CELLES-CI