Sceletium (aizoaceae) alkaloids: total synthesis of racemic mesembranone, joubertinamine and epijoubertinamine
作者:Ignacio H. Sánchez、José de Jesús Soria、María Isabel Larraza、Humberto J. Flores
DOI:10.1016/s0040-4039(00)81461-6
日期:1983.1
The total synthesis of the Sceletium alkaloids mesembranone, joubertinamine and epijoubertinamine via the intramolecular cyclization of an enone to a benzensulfo amide grouping under the conditions of a dissolving metal reduction is described.
Total synthesis of Sceletium alkaloids (±)-joubertinamine, (±)-epijoubertinamine, (±)-tortuosamine and formal synthesis of (±)-mesembrine, (±)-N-formyltortuosamine
作者:Viraj A. Bhosale、Dattatraya U. Ukale、Suresh B. Waghmode
DOI:10.1039/c6nj00630b
日期:——
An efficient collective formal/total synthesis of Sceletium alkaloids and their seco-congeners has been reported. The bicyclic core of (±)-mesembrine, (±)-tortuosamine, and (±)-N-formyltortuosamine with all required functionalities including the characteristic quaternary benzylic carbon is achieved by employing the Wittig olefination–Claisen rearrangement protocol and synergistic Cu(I)/iminium catalyzed