Abstract The degradation of thionocarbonates, prepared from vicinal diols in the alditol series, and of cis -vicinal diols when part of an aldopyranose, has been investigated as a means of introducing unsaturation into molecules of the carbohydrate type. The O -benzylation of mono- O -isopropylidene- l -rhamnose has been shown to give the anomeric benzyl 4- O -benzyl-2,3- O -isopropylidene- l -rhamnopyranosides
摘要已经研究了由醛糖醇系列邻位二醇制得的
硫代
碳酸酯和部分醛
吡喃糖时顺式邻位二醇的降解,作为将不饱和度引入
碳水化合物类型分子中的一种方法。已经显示单-O-异亚丙基-1-
鼠李糖的O-苄基化产生异头苄基-4-O-苄基-2,3-O-异亚丙基-1-
鼠李糖吡喃糖苷。这与
吡啶中的O-
甲苯-对-磺酰化和通过Purdie方法的O-甲基化相反,两者均产生5-取代的2,3-O-异亚丙基-1-
鼠李糖呋喃糖衍
生物。