Preparation of aminosaccharides using ester-imine condensations: syntheses of methyl -benzoylacosaminide and methyl -[oxo(phenylmethoxy) acetyl)daunosaminide from (S)-ethyl 3-hydroxybutyrate
作者:Judith C. Gallucci、Deok-Chan Ha、David J. Hart
DOI:10.1016/0040-4020(89)80126-7
日期:1989.1
The dianion of (S)-ethyl β-hydroxybutyrate (1) was treated with -trimethylsilyl Imine 2 to afford β-lactam 4. The same dianion reacted with -ary1 imine 10 to give β-lactams 11, 12, and 13. A three-step sequence was used to convert 4 into the β-lactam-pyran hybrid 9 while a five-step sequence was developed to transform 11 and 12 into 9. Application of the carboxyinversion reaction to derivatives of
将(S)-β-羟基丁酸乙酯(1)的二价阴离子用-三甲基甲硅烷基亚胺2处理,得到β-内酰胺4。相同的二价阴离子与-ary1亚胺10反应得到β-内酰胺11、12和13。使用三步序列将4转化为β-内酰胺-吡喃杂化物9,同时开发了五步序列将11和12转化为9。将羧基转化反应应用于9的衍生物,可得到氨基-保护的类似物糖蜜(5)和二十二胺(6)。