Desulfurization of sultones with simultaneous methylenation
作者:Peter Metz、Dieter Seng、Bernd Plietker
DOI:10.1016/0040-4039(96)00728-9
日期:1996.5
is achieved by alkylation of 2 with (iodomethyl)trimethylsilane and subsequent treatment of the resultant products 7 with tetra-n-butylammonium fluoride. Application of this two-step procedure to sultone 8 leads to 1,3-diene 10, an intermediate for the synthesis of the highly oxygenated 1,10-seco-eudesmanolides eriolanin and eriolangin.
Intramolecular Diels-Alder reaction of vinylsulfonates derived from hydroxyalkyl substituted 1,3-dienes and oxidative desulfurization of the resultant sultones
作者:Peter Metz、Michael Fleischer、Roland Fröhlich
DOI:10.1016/0040-4020(94)00969-2
日期:1995.1
Vinylsulfonates prepared from hydroxyalkyl substituted cycloalka-1,3-dienes and acyclic 1,3-dienes by esterification with vinylsulfonyl chloride cycloadd to δ-sultones at temperatures ranging from 0 °C to reflux in toluene. High diastereoselectivity is observed for substrates 2 featuring a cyclic 1,3-diene moiety, whereas a substituent R2 larger than hydrogen is necessary to achieve good to excellent