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. | Publicación