Organolithium-Mediated Conversion of β-Alkoxy Aziridines into Allylic Sulfonamides: Effect of the <i>N</i>-Sulfonyl Group and a Formal Synthesis of (±)-Perhydrohistrionicotoxin
作者:Susannah C. Coote、Stephen P. Moore、Peter O’Brien、Adrian C. Whitwood、John Gilday
DOI:10.1021/jo801586h
日期:2008.10.3
yields compared to the analogous N-Ts compounds. The success with the N-Bus aziridines facilitated the development of a new route to the spirocyclic core of the histrionicotoxins and completion of a formal synthesis of (+/-)-perhydrohistrionicotoxin.
New Route to Azaspirocycles via the Organolithium-Mediated Conversion of β-Alkoxy Aziridines into Cyclopentenyl Amines
作者:Stephen P. Moore、Susannah C. Coote、Peter O'Brien、John Gilday
DOI:10.1021/ol062073e
日期:2006.10.1
A new three-step route to azaspirocycles involving the organolithium-mediated conversion of beta-alkoxy aziridines into substituted cyclopentenyl amines, hydroboration, and cyclization has been developed. The methodology is utilized in the construction of the pentacyclic ring system of cephalotaxine. [reaction: see text]