The first replacement of a chlorosulphonyloxy group by chlorine at C-2 in methyl α-D-glucopyranoside and sucrose derivatives
作者:Riaz Khan、Michael R. Jenner、Harald Lindseth
DOI:10.1016/s0008-6215(00)83670-8
日期:1980.1
corresponding chlorodeoxy- manno derivatives. Treatment of the 2-chlorosulphate 2 with such nucleophilic reagents as lithium bromide, sodium azide, sodium chloride, and sodium benzoate in hexamethylphosphoric triamide gave the 2-hydroxy compound as a major product. Selective chlorination at C-1′ was achieved when 3,4,6,3′,4′,6′-hexa- O -acetylsucrose was treated with sulphuryl chloride in a mixture of
摘要3-甲基-O-乙酰基-4,6-O-亚苄基-α-D-吡喃葡萄糖苷2-氯代硫酸盐(2),3,4,6,3',4',6'-六-O-乙酰基蔗糖的处理2,1'-双(氯代硫酸盐),3,4,6,3',4',6'-六-O-乙酰基-1'-O-苯甲酰蔗糖2-氯代硫酸盐和3,4,3',4六甲基磷酸三酰胺中的'-四-O-乙酰基-6,6'-二氯-6,6'-二脱氧蔗糖2,1'-双(氯硫酸盐)与氯化锂得到相应的氯代脱氧-甘露糖衍生物。用亲核试剂如溴化锂,叠氮化钠,氯化钠和苯甲酸钠在六甲基磷酸三酰胺中处理2-氯硫酸盐2,得到2-羟基化合物,为主要产物。当在吡啶和氯仿的混合物中用硫酰氯处理3,4,6,3',4',6'-六-O-乙酰基蔗糖时,在C-1'处实现了选择性氯化。