Enantioselective syntheses of carbocyclic nucleosides 5′-homocarbovir, epi-4′-homocarbovir, and their cyclopropylamine analogs using facially selective Pd-mediated allylations
摘要:
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 cyclopropylamine analogs, (-)-5'-homoabacavir, and (+)-epi-4'-homoabacavir. All carbonucleoside target molecules were evaluated for antiviral activity. (C) 2010 Elsevier Ltd. All rights reserved.
Enantioselective syntheses of carbocyclic nucleosides 5′-homocarbovir, epi-4′-homocarbovir, and their cyclopropylamine analogs using facially selective Pd-mediated allylations
摘要:
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 cyclopropylamine analogs, (-)-5'-homoabacavir, and (+)-epi-4'-homoabacavir. All carbonucleoside target molecules were evaluated for antiviral activity. (C) 2010 Elsevier Ltd. All rights reserved.