作者:Joachim Thiem、Werner Klaffke、Dirk Springer
DOI:10.1016/0008-6215(88)85092-4
日期:1988.3
Abstract The phase-transfer catalyzed benzylation of 1,5-anhydro-2,6-dideoxy- l - arabino -hex-1-enitol ( l -rhamnal, 5 ) led to a mixture of 4- and 3- O -benzyl derivatives in the ratio of 2:1. By silylation, 5 was regiospecifically transformed into either the 3- O - tert -butyldimethylsilyl ( 3 ) or the 3- O - tert -butyldiphenylsilyl ( 7 ) derivatives, both compounds being characterized as their
摘要1,5-脱水-2,6-二脱氧-1-阿拉伯糖-己-1-烯醇(l-rhamnal,5)的相转移催化苄基化反应产生了4-和3-O-苄基衍生物的混合物以2:1的比例。通过甲硅烷基化,将5区域特异性地转化为3-O-叔丁基二甲基甲硅烷基(3)或3-O-叔丁基二苯基甲硅烷基(7)衍生物,两种化合物均以其单乙酸酯4和8为特征,并进行糖基化得到苄基3 -O-(叔丁基二甲基甲硅烷基)-(9)和3-O-(叔丁基二苯基甲硅烷基)-2,6-二脱氧-2-碘-α-1-阿拉伯糖-己吡喃糖苷。N-碘代琥珀酰亚胺4与9的糖基化作用相继产生α-1(1→4)连接的二糖和三糖11和13。“一锅法” N-碘琥珀酰亚胺的方法,是从特别封闭的糖3开始,