A synthesis of 8-methoxycarbonyloct-1-yl O-α-d-galactopyranosyl-(1→3)-O-β-d-galactopyranosyl-(1→4)-2-acetamido-2-deoxy-β-d-glucopyranoside
作者:Per J. Garegg、Stefan Oscarson
DOI:10.1016/0008-6215(85)85197-1
日期:1985.2
obtain the α- d -galactosyl linkage and silver triflate promotion with a participating 2-substituent (benzoyl) was used to obtain the β- d -galactosyl linkage in a facile synthesis of the title trisaccharide derivative. The synthesis also incorporates the use of stable thioglycoside intermediates, easily converted into the appropriate galactosyl bromides, as well as regioselective, reductive and acid-catalysed
摘要卤化物辅助的糖基化反应是通过在糖基卤中使用非参与的2位取代基(苄基)来获得的α-d-半乳糖基键和三氟甲磺酸银与参与的2位取代基(苯甲酰基)的促进作用而获得的标题三糖衍生物的简便合成中的β-d-半乳糖基键。该合成方法还包括使用稳定的硫代糖苷中间体,这些中间体容易转化为合适的半乳糖基溴化物,以及分别通过环选择性,还原性和酸催化的环状缩醛和原酸酯开口,以获得所需的中间体。