An efficient and mild intramolecular oxidative nucleophilic cyclisation protocol has been developed for the conversion of γ, δ-olefinic alcohols into the hemiketals, which in turn on deoxygenation led to the very important C-glycoside class of compounds.
An In-Depth Study on Ring-Closing Metathesis of Carbohydrate-Derived α-Alkoxyacrylates: Efficient Syntheses of DAH, KDO, and 2-Deoxy-β-KDO
作者:Koen F. W. Hekking、Marcel A. H. Moelands、Floris L. van Delft、Floris P. J. T. Rutjes
DOI:10.1021/jo060913x
日期:2006.8.1
Novel, efficient synthetic pathways to DAH, KDO, and 2-deoxy-β-KDO are described. Ring-closingmetathesis (RCM) of highly functionalized α-alkoxyacrylate fragments resulted in a series of synthetically versatile oxygen heterocyclic intermediates. Further functionalization of the resulting enol ether double bond and subsequent deprotection provided the natural products in high overall yields, starting