Towards EPC-syntheses of the structural class of cochleamycins and macquarimicins. Part 1: EPC-synthesis of the hydrindene subunit of the cochleamycins
作者:A. Chrobok、E. Gössinger、E. Orglmeister、K. Pflugseder、J. Schwaiger、F. Wuggenig
DOI:10.1016/j.tet.2007.05.092
日期:2007.8
A racemic as well as an EPC-synthesis of the cis-hydrindene subunit of the cochleamycins, physiologically active microbial secondary metabolites, are reported. The five stereogenic centres of this subunit are introduced in high stereoselectivity in a short sequence by intermolecular Diels-Alder reaction, stereoselective methylation and hydride reduction. Cyclisation via nucleophilic addition, acidic fragmentation, regioselective Shapiro reaction and inversion of a secondary alcohol are the further key steps of these syntheses. (c) 2007 Elsevier Ltd. All rights reserved.