Definition: In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.
Input: Carbocyclic nucleosides (À)-5 0 -homocarbovir and (þ)-epi-4 0 -homocarbovir were prepared from an acylnitroso-derived hetero DielseAlder 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 0 -hydroxyethyl groups. Late stage derivatization gave access to the cyclopropylamine analogs, (À)-5 0 -homoabacavir, and (þ)-epi-4 0 -homoabacavir. All carbonucleoside target molecules were evaluated for antiviral activity.

Enantioselective syntheses of carbocyclic nucleosides 5 0 -homocarbovir, epi-4 0 -homocarbovir, and their cyclopropylamine analogs using facially selective Pd-mediated allylations