possess a unique and highly congested 5/3/7/6/5 fused ringsystem. These compounds also contain a sterically encumbered isopropyl trans-hydrindane motif and a cyclopropane motif bearing two quaternary centers, which make them remarkably challenging synthetic targets. Herein, we report the successful construction of the key highly substituted ABC ringsystem in a stereoselective manner.
Stereocontrolled Total Synthesis of Hispidospermidin
作者:Alison J. Frontier、Subharekha Raghavan、Samuel J. Danishefsky
DOI:10.1021/ja970889s
日期:1997.7.1
A Highly Stereoselective Total Synthesis of Hispidospermidin: Derivation of a Pharmacophore Model
作者:Alison J. Frontier、Subharekha Raghavan、Samuel J. Danishefsky
DOI:10.1021/ja9944960
日期:2000.7.1
The totalsynthesis of the title compound has been accomplished. Among the key steps were (i) a conjugate additionRobinson annulation-type sequence (see 4), (ii) intramolecular carbomercuration (see 3), (iii) a reduction−ketonization sequence (see 25), (iv) cycloetherification of an unactivated methylene group (see 28), and reductive amination (see 1). A highly preliminary SAR profile suggests that