The invention concerns a novel method for preparing by chemical process functionalised &bgr;-(1,3)-glucan derivatives, enabling to obtain free oligosaccharides or comprising specific groups such as, for instance, sulphate, phosphate, methyl, in predetermined positions. Said method consists in reacting a glycosyl donor of formula (Ia) or (Ib) with a glycosyl scavenger of formula (II), as defined in the claims. The invention is useful for preparing biologically active principles for use in the agricultural, cosmetic or pharmaceutical field.
本发明涉及一种新的
化学制备功能化的β-(1,3)-
葡聚糖衍
生物的方法,能够获得自由
寡糖或包含特定基团,例如
硫酸盐、
磷酸盐、甲基,在预定位置上。所述方法包括将式(Ia)或(Ib)的糖基供体与式(II)的糖基清除剂反应,如权利要求所定义的。本发明用于制备在农业、化妆品或制药领域中使用的
生物活性原理。