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Carbocyclic nucleosides (−)-5′-homocarbovir and (+)-epi-4′-homocarbovir were prepared from an acylnitroso-derived hetero Diels–Alder cycloadduct. A kinetic enzymatic resolution generated an enantiopure aminocyclopentenol and Pd(0)-mediated decarboxylative allylations of allyl 2,2,2-trifluoroethyl malonates were used to install the 4′-hydroxyethyl groups. Late stage derivatization gave access to the...
Carbocyclic aminonucleosides and epi-4′-carbocyclic puromycin were prepared from an acylnitroso-derived hetero Diels–Alder cycloadduct. Pd(0)/InI-mediated allylations of a formyl species were used to install the 4′-hydroxymethyl group. A tethered aminohydroxylation strategy was employed to install the cis-2′,3′-aminoalcohol moiety with complete regio- and diastereocontrol.
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