Total synthesis of (±)-rhazinal, an alkaloidal spindle toxin from Kopsia teoi
作者:Martin G. Banwell、Alison J. Edwards、Katrina A. Jolliffe、Jason A. Smith、Ernest Hamel、Pascal Verdier-Pinard
DOI:10.1039/b209992f
日期:2003.1.13
The title alkaloid 1 and its B-nor-congener 3, both of which display potent and unusual anti-mitotic properties, have been synthesized in racemic form and characterised by single-crystal X-ray analysis.
Chemical Synthesis of Aspidosperma Alkaloids Inspired by the Reverse of the Biosynthesis of the Rhazinilam Family of Natural Products
作者:Lindsay McMurray、Elizabeth M. Beck、Matthew J. Gaunt
DOI:10.1002/anie.201204151
日期:2012.9.10
substituted pyrrole derivative. This derivative could be transformed into the pyrrole‐containing secondary metabolite, rhazinilam, which could in turn be transformed through a reductive transannular cascade process into the structurally complex pyrrolidine‐containing alkaloidnaturalproduct, aspidospermidine.
The biaryl core structure of rhazinilam with its fixed dihedral angle is a pivotal element for its unique in vitro cytotoxic activity. Most of the related natural products are oxidized versions of rhazinilam. Replacing the sensitive pyrrole ring by a pyrrolinone ring is the basis of our initial strategy towards rhazinilamanalogues. With this goal, variants of the sequence crossed Mukaiyama aldol reaction