Flexible Synthesis of Metacycloprodigiosin and Functional Derivatives Thereof
作者:Alois Fürstner、Helga Krause
DOI:10.1021/jo991022a
日期:1999.10.1
this sequence involve a palladium-catalyzedmacrocyclizationreaction of vinyl epoxide 10, the conversion of the alpha-pyrone derivative 14 into the pyrrole targets, and the attachment of the side chain via a Wittig (or Peterson) olefination followed by hydrogenation of the alkene formed over Crabtree's catalyst. The flexibility of this route is demonstrated by the synthesis of several analogues of