New synthetic routes to the kainoids: a synthesis of kainic acid and its analogues
作者:Philip J. Parsons、Stephen P.G. Rushton、Raghava R. Panta、Adrian J. Murray、Martyn P. Coles、Jason Lai
DOI:10.1016/j.tet.2011.10.030
日期:2011.12
New approaches to the synthesis of kainic acid and itsanalogues are presented. Two distinctly different approaches are described; the former utilised an intermolecular nitrile oxide addition to a homochiral substrate to furnish epikainate models and the second utilised amino acid chemistry to secure kainic acid.
Novel Routes to the Kainates: Stereoselectivity in Addition Reactions to Pyrrole [1,2<i>c</i>]-oxazol-3-one
作者:P. J. Parsons、A. J. Murray、E. S. Greenwood、E. M. Viseux
DOI:10.1055/s-2004-829076
日期:——
This paper describes the addition of a range of electrophiles to 1. An unusual and unpredicted stereochemistry of addition has been observed in line with our original photochemical observations.
The combined use of stereoelectronic control and ring closing metathesis for the synthesis of (−)-8-epi-swainsonine
作者:Adrian J. Murray、Philip J. Parsons、Peter Hitchcock
DOI:10.1016/j.tet.2007.03.103
日期:2007.7
A novel and efficient synthesis of (−)-8-epi-swainsonine 2 is reported. Stereocontrolled diol formation from the bicyclic alkene 3 followed by a stereoselective vinylation of the aldehyde and ring closing metathesis gave the indolizidine ring system, which was converted into (−)-8-epi-swainsonine 2.
The preparation of the fused bicycle 14 is reported together with its photocyclisation to the dioxinone 2. Base induced fragmentation of the photoadduct 15 formed exclusively in the aforementioned photocylisation, followed by Wittig methylenation gave the kainoid derivative 18.