Quantitative Monitoring of Solid-Phase Synthesis Using Gated Decoupling13C NMR Spectroscopy with a13C-Enriched Protecting Group and an Internal Standard in the Synthesis of Sialyl LewisX Tetrasaccharide
Just tagging along. For the nondestructive quantitative monitoring of solid-phase oligosaccharide synthesis a 13 C-enriched tag (*) was incorporated in the linker and a 13 C-enriched protecting group (⧫) was included in the growing molecule. By integration of the signals in a gated decoupling 13 C NMR experiment the reaction progress can be monitored. This method was demonstrated with the synthesis of sialyl Lewisx tetrasaccharide on a Tentagel support ((P)). Bn=benzyl, PEG=poly(ethylene glycol).
Solid-Phase Synthesis of Oligosaccharides and On-Resin Quantitative Monitoring Using Gated Decoupling <sup>13</sup>C NMR
作者:Takuya Kanemitsu、Chi-Huey Wong、Osamu Kanie
DOI:10.1021/ja0167396
日期:2002.4.1
A general strategy for solid-phaseoligosaccharidesynthesis capable of nondestructive quantitative monitoring has been developed. The synthesis was carried out on TentaGel using thioglycosides as glycosylating agents and dimethylthiomethylsulfonium triflate as the activator. An acylsulfonamide linker was introduced to cleave the oligosaccharide from the resin. The solid-phase reactions were monitored