1,2-O-Trichloroethylidene acetal group protected 3,5-dieno-1,4-furanose derivatives
作者:Nilgün Yenil、Levent Yüceer
DOI:10.1016/s0008-6215(03)00337-9
日期:2003.9
beta-chloralose are described. Endocyclic double bond formations were realised by the elimination of 3-acetoxy groups using DMF-sodium bicarbonate. This elimination was not successful when the starting compound was 1,2-O-(R)-trichloroethylidene-alpha-D-glucofuranose (alpha-chloralose), where the trichloromethyl group occupies the endo position.
3,5-(E)-dieno-3,5,6,8-四脱氧-(S)-1,2-O-三氯亚乙基-α-D-甘油-octo-1,4-呋喃酮-7的制备从1,2-O-(S)-三氯亚乙基-α-D-葡萄糖基呋喃糖(β-氯醛糖)或1,2-O-(S)-三氯亚乙基-α-D-半乳糖呋喃糖(半乳糖氯醛)开始3,5-(E)-dieno-3,5,6-trideoxy-(S)-1,2-O-trichloroethylidene-alpha-D-glycerome-hepta-1,4-furano-uronate的制备描述了β-氯藻糖。内环双键的形成是通过使用DMF-碳酸氢钠消除3-乙酰氧基来实现的。当起始化合物为1,2-O-(R)-三氯亚乙基-α-D-葡萄糖呋喃糖(α-氯醛糖)(其中三氯甲基占据内位)时,这种消除不成功。