作者:Atsushi Abiko、Ji-Feng Liu、Guo-qiang Wang、Satoru Masamune
DOI:10.1016/s0040-4039(97)00580-7
日期:1997.5
New chiral auxiliaries based on the bicyclic-isoxazolidine skeleton, 3-oxa-2,7-diazabicylo[3,3,0]octane derivatives, were synthesized in 60–80% overall yields from amino acids. Asymmetric alkylation and boron aldol reaction using the auxiliaries proceeded with high selectivities. “Carboxylic amide” has been used for the asymmetric boron-mediated aldol reaction for the first time.
基于双环异恶唑烷骨架的3-xa-2,7-二氮杂双[3,3,0]辛烷衍生物的新手性助剂,其氨基酸总产率为60-80%。使用助剂的不对称烷基化和硼醛醇缩合反应具有很高的选择性。“羧酸酰胺”首次用于不对称硼介导的羟醛反应。