A Short Synthesis of Azasugars via Aldol Reaction of Chelated Amino Acid Ester Enolates
作者:Roland Grandel、Uli Kazmaier
DOI:10.1016/s0040-4039(97)10176-9
日期:1997.11
Aldol reactions of chelated amino acid ester enolates with chiral aldehydes gives rise to polyhydroxylated amino acids in a highly stereoselective fashion. These oxygenated amino acids can be converted into polyhydroxylated pipecolinic acids and azasugars by cyclization using the Mitsunobu reaction. A interesting epimerization was observed during the cyclization. © 1997 Elsevier Science Ltd.
螯合的氨基酸酯烯醇化物与手性醛的醛醇缩合反应以高度立体选择性的方式产生多羟基化的氨基酸。这些氧化的氨基酸可以通过使用Mitsunobu反应通过环化而转化为多羟基化的胡椒酸和氮杂糖。在环化过程中观察到有趣的差向异构。©1997爱思唯尔科学有限公司。