Evidence on the structure of coyolosa. Synthesis of 6,6′-ether linked hexoses
作者:Alan H. Haines
DOI:10.1016/j.tetlet.2003.11.033
日期:2004.1
The structure previously reported for coyolosa, a hypoglycemic substance isolated from natural sources, as a 6,6′-ether linked pseudo-disaccharide derived from allose, is incorrect since 6-O-(6-deoxy-d-allos-6-yl)-d-allose 10, synthesised by an unequivocal route, and its derived peracetate 11, both have spectral properties, which differ from those reported for coyolosa and its peracetate. A versatile
结构先前报道为coyolosa,从天然来源中分离的低血糖的物质,作为6,6 ' -醚连接的从阿洛糖衍生的伪双糖,是不正确,因为6- ø - (6-脱氧d-阿洛斯-6-基)-d-阿洛糖10(通过明确的路线合成)及其衍生的过乙酸盐11,两者均具有光谱性质,不同于报道的油蓝及其过乙酸盐的光谱性质。已经开发了用于这种类型化合物的通用合成方法,该化合物包含通过醚键在其主要中心连接的两个碳水化合物部分,这涉及用碳水化合物醇盐置换主要的三氟甲磺酸酯,并且允许制备对称和不对称的化合物。这类化合物的代表。