Stereospecific synthesis of branched-chain sugars by a novel aldol-type cyclocondensation
作者:María-Jesús Pérez-Pérez、María-José Camarasa、Angel Díaz-Ortiz、Ana San Félix、Federico G. de las Heras
DOI:10.1016/0008-6215(92)84176-s
日期:1992.9
Abstract A procedure for the preparation of branched-chain sugars having highly functionalised C -branches is reported. Reaction of furanos-3-uloses, pyranos-3-uloses, or pyranos-2-uloses with sodium cyanide followed by mesylation of the corresponding cyanohydrin afforded α-mesyloxynitriles which, on treatment with base, underwent aldol-type cyclocondensation to yield furanose-3-spiro-, pyranose-3-spiro-
摘要报道了制备具有高度官能化的C-支链的支链糖的方法。呋喃并-3-ulose,吡喃并-3-ulose或吡喃并-2-ulose与氰化钠反应,然后将相应的氰醇甲磺酸化,得到α-甲磺酰腈,在用碱处理后,进行了醛醇型环缩合反应生成呋喃糖- 3-螺-,吡喃糖-3-螺-和吡喃糖-2-螺-5'-((4'-氨基-1',2'-草硫醇-2',2'-二氧化物)衍生物。用甲醇甲醇钠处理呋喃糖-3-螺衍生物,得到具有与起始氰醇相同构型的C-[((E)-1-氨基-2-(甲氧基磺酰基)乙烯基]支链糖。