A Second-Generation Tandem Ring-Closing Metathesis Cleavable Linker for Solid-Phase Oligosaccharide Synthesis
作者:Ana R. de Jong、Anne G. Volbeda、Bas Hagen、Hans van den Elst、Herman S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée
DOI:10.1002/ejoc.201301055
日期:2013.10
A tandemring-closingmetathesiscleavablelinker system for solid-phaseoligosaccharidesynthesis has been developed. The acid- and base-stable linker can be readily cleaved with Grubbs second-generation catalyst without the use of alkene additives to liberate the assembled oligosaccharides from the solid support. Application of the linker was shown in three solid-phaseoligosaccharidesynthesis campaigns
2,2-Dimethyl-4-(4-methoxy-phenoxy) butanoate and 2,2-Dimethyl-4-azido Butanoate: Two New Pivaloate-ester-like Protecting Groups
作者:Riccardo Castelli、Herman S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée
DOI:10.1021/ol4008475
日期:2013.5.3
extend the available orthogonalities within the class of protectinggroups removed by assisted cleavage. The mild, complementary (oxidative vs reductive) reaction conditions for the removal, together with their pivaloate-like character, were exploited, in combination with a levulinoyl-ester functioning as a third orthogonal protectinggroup, in the assembly of a Streptococcus mutans hexasaccharide