Abstract Allyl 4- O -(4- O -acetyl-2- O -benzoyl-3,6-di- O -benzyl-β- d -galactopyranosyl)-2- O -benzoyl-3,6-di- O -benzyl-α- d - galactopyranoside was O -deallylated to give the 1-hydroxy derivative, and this was converted into the corresponding 1- O -( N -phenylcarbamoyl) derivative, treatment of which with dry HCl produced the α- d -galactopyranosyl chloride. This was converted into the corresponding
摘要烯丙基4-O-(4-O-乙酰基-2-O-苯甲酰基-3,6-二-O-苄基-β-d-
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乳糖基)-2-O-苯甲酰基-3,6-二-O-将苄基-α-d-
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乳糖苷进行O-去甲酰化,得到1-羟基衍
生物,然后将其转化为相应的1-O-(N-苯基
氨基甲酰基)衍
生物,用无
水HCl处理可得α-d-
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乳糖苷
氯化物。将其转化为相应的2,2,2-
三氟乙烷磺酸盐,将其与烯丙基2-O-苯甲酰基-3,6-二-O-苄基-α-d-
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乳糖苷偶联,得到结晶烯丙基4-O- [ 4-O-(4-O-乙酰基-2-O-苯甲酰基-3,6-二-O-苄基-β-d-
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乳糖基)-2-O-苯甲酰基-3,6-二-O-苄基- β-d-
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乳糖苷] -2-O-苯甲酰基-3,6-二-O-苄基-α-d-
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乳糖苷(15),产率为85%,未发现痕量的α端基异构体。用在95%
乙醇中的2%KCN使三糖衍
生物15脱酯,并用H 2 -Pd将产物O