Total Synthesis of Selaginpulvilin C and D Relying on <i>in Situ</i> Formation of Arynes and Their Hydrogenation
作者:Rajdip Karmakar、Daesung Lee
DOI:10.1021/acs.orglett.6b03241
日期:2016.12.2
total syntheses of selaginpulvilins C and D is described. The key strategy for the construction of the core fluorene moiety involves in situ formation of an aryne intermediate followed by its formal hydrogenation. The precursor tetraynes that undergo aromatization via hexadehydro Diels–Alderreaction were prepared from readily available building blocks through typical alkyne-coupling reactions.
Dienyne Ring-Closing Metathesis Approach for the Construction of Taxosteroids
作者:María J. Aldegunde、Rebeca García-Fandiño、Luis Castedo、Juan R. Granja
DOI:10.1002/chem.200601685
日期:2007.6.15
hybrid compounds-the taxosteroids-possessing carbon frameworks incorporating moieties characteristic of both taxanes (such as ABrings) and steroids (i.e., CD system and side chain). This tandem cyclization is highly stereoselective, allowing the one-step formation of the bicyclo[5.3.1]undecene system characteristic of taxol. In this work we describe the scope and limitations of such cyclizations.