Cleavage of the acetal rings in bis(methyl 4,6-O-benzylidene-α-d-glucopyranosido)-18-crown-6
作者:Péter Bakó、László Fenichel、László Tőke、Gábor Tóth
DOI:10.1016/0008-6215(86)85004-2
日期:1986.3
Abstract Treatment of bis(methyl 4,6- O -benzylidene-2,3-dideoxy-α- d -glucopyranosido [2,3- b ][2′,3′- k ])-1,4,7,10,13,16-hexaoxacyclo-octadecane ( 1 ) with aqueous acetic acid gave bis(methyl 2,3-dideoxy-α- d -glucopyranosido[2,3- b ][2′,3′- k ])-1,4,7,10,13,16-hexaoxacyclo-octadecane ( 2 ). With LiAlH 4 AlCl 3 , 1 gave a mixture of three O -benzyl derivatives in which bis(methyl 4- O -benzyl-2,3-dideoxy-α-
双(甲基4,6-O-亚苄基-2,3-二脱氧-α-d-吡喃葡萄糖苷[2,3- b] [2',3'- k])-1,4,7,10的处理,13,16-六氧杂环十八烷(1)与乙酸水溶液反应生成双(甲基2,3-二脱氧-α-d-吡喃葡萄糖基[2,3- b] [2',3'- k])-1, 4,7,10,13,16-六氧杂环-十八烷(2)。用LiAlH 4 = AlCl 3,得到三种O-苄基衍生物的混合物,其中双(甲基4-O-苄基-2,3-二脱氧-α-d-吡喃葡萄糖基[2,3-b] [2', 3'-k])-1,4,7,10,13,16-六氧杂环-十八烷优先。在两相系统中2的甲基化和丁基化得到四甲氧基和四丁氧基冠。双(甲基4-O-乙酰基-2,3-二脱氧-6-O-三苯甲基-α-d-吡喃葡萄糖基[2,3-b] [2',3'-k])-1,4,7,通过三苯甲基化和乙酰化从2获得10,13,16-六氧杂环-十八烷(