A. Arnone et al., AN ENANTIOSPECIFIC ENTRY TO FLUORO SUBSTITUTED AMINOCYCLOPENTANOLS THROUGH INTRAMOLECULAR NITRILE OXIDE, NITRONE, AND OXIME CYCLOADDITION REACTIONS, Tetrahedron : asymmetry, 5(6), 1994, pp. 1019-1028
Starting from (2R,3S)-2-benzyloxy-3-fluoro-5-hexenale 2 and its (2R,3R
) epimer, cyclopentanoisoxazolidines 4 and 7 are obtained with complet
e diastereoselectivity through nitrone and oxime intramolecular cycloa
ddition reactions. In contrast, cyclopentanoisoxazolines 6 are formed
with only medium stereoselectivity through intramolecular nitrile oxid
e cycloaddition reactions. Further elaboration of these bicyclic compo
unds affords fluoro substituted aminocyclopetanols 8 and 10 in enantio
merically and diastereoisomerically pure form.