1-C and 2-C-branched carbohydrates are present as substructures in a number of biologically important compounds. Although the synthesis of such carbohydrate derivatives is extensively studied, the synthesis of 1,2-cis-2-C-branched C-, S-, and N-glycosides is less explored. In this article a synthetic strategy for the synthesis of 1,2-cis-2-C-branched-aryl-C-glucosides is reported via a hydrogenolytic desulfurization of suitably orientated carbohydrate based hemithioacetals. 1,2-cis-2-Hydroxymethyl and 2-carbaldehyde of aryl-C-glucosides have been synthesized using the current strategy in very good yields. The 2-carbaldehyde-aryl-C-glucosides have been identified as suitable substrates for the stereospecific preparation of 2,3-unsaturated-aryl-C-glycosides (Ferrier products).
1-
C和2-
C-支链
碳水化合物作为亚结构存在于许多
生物重要化合物中。尽管这种
碳水化合物衍
生物的合成得到了广泛研究,但1,2-
cis-2-
C-支链
C、
S和
N-糖苷的合成却较少探索。本文报道了一种合成策略,通过适当定向的基于
碳水化合物的半
硫醇
缩醛的
氢解
脱硫,合成了1,2-
cis-2-
C-支链-芳基-
C-
葡萄糖苷。使用当前策略,合成了2-
羟甲基和2-羰基芳基-
C-
葡萄糖苷,收率非常高。已确定2-羰基芳基-
C-
葡萄糖苷是2,3-不饱和芳基-
C-糖苷(费里尔产物)的立体特异性制备的合适底物。