Pl. Armstrong et al., AN UNUSUALLY FACILE [3,3]-SIGMATROPIC REARRANGEMENT IN A STEREOSPECIFIC SYNTHESIS OF NOVEL 2',3'-DIDEOXYNUCLEOSIDE PRECURSORS, Tetrahedron letters, 36(24), 1995, pp. 4311-4314
The glycal 5 is converted to intermediates which undergo, under mild c
onditions, thermal aza-Claisen rearrangements, leading to tile amides
7 and 8 and the 2-pyrimidone 9, all potential precursors to 2',3'-dide
oxynucleosides.