Annulation of β-aryl-α-nitro-α,β-enals and 2,2-dimethyl-1,3-dioxan-5-one: A one-step assembly of nitrocyclitols. Application to a short practical synthesis of (±)-7-deoxy-2-epi- pancratistatin tetraacetate

1. Ortiz, J.C.
2. Ozores, L.
3. Cagide-Fagín, F.
4. Alonso, R.