3-unsaturated glycosyl azides. Similar reactions with derivatives of 4,6-O-benzylidene- d -allal and -glucal and with related 2,3-unsaturated analogues gave only azido-glycals. The mechanism of these reactions is discussed and compared with reactions of the tri-O-acetyl-glycals and related systems.
摘要3,4,6-三-O-苄基-d-
葡糖醛和4,6-二-O-苄基-2,3-二脱氧-己基-2-烯
吡喃糖苷在
三氟化硼催化下与
叠氮化
钠在
乙腈中反应得到3-
叠氮基-糖基和2,3-不饱和糖基
叠氮化物的混合物。与4,6-O-亚苄基-d-alal和-glucal的衍
生物以及与相关的2,3-不饱和类似物的类似反应仅产生
叠氮基-糖基。对这些反应的机理进行了讨论,并将其与三-O-乙酰基
缩醛和相关体系的反应进行了比较。