Side reactions with 2,2,2-trichloroethoxysulfates during the synthesis of glycans
作者:Kenya Matsushita、Yuta Sato、Shinji Funamoto、Jun-ichi Tamura
DOI:10.1016/j.carres.2014.05.012
日期:2014.9
Protected sulfate groups may be used as an alternative tool to provide sulfate esters at hydroxyl and amino groups, particularly on complex glycans. We examined 2,2,2-trichloroethoxysulfation at the mono-, di-, and trihydroxyl groups of saccharide moieties to show regioselective sulfation. We found some side reactions including inter- and intramolecular nucleophilic reactions with 2,2,2-trichloroethoxysulfates
受保护的硫酸盐基团可用作在羟基和氨基基团上提供硫酸酯的替代工具,特别是在复杂的聚糖上。我们检查了糖部分的单,二和三羟基处的2,2,2-三氯乙氧基硫酸化反应,以显示区域选择性的硫酸化作用。我们发现了一些副反应,包括与2,2,2-三氯乙氧基硫酸盐的分子间和分子内亲核反应。