作者:Dawei Ma、Weiqing Xie、Bin Zou、Qiong Lei、Duanqing Pei
DOI:10.1016/j.tetlet.2004.08.179
日期:2004.10
Aldol reaction of N,N-dibenzyl valinal with propiolic acid ethyl ester derived lithium reagent provides anti-aminoalcohol 8 and syn-aminoalcohol 9, which are converted into the lactone 6 via two different routes. Alkylation of 6 followed by lactone ring opening afford the acid 2a, which is coupled with the amine 3 and 5-methylisoxazole-3-carboxylate acid 1, respectively, to deliver AG7088.
N,N-二苄基缬氨酸与丙酸乙酯衍生的锂试剂的醛醇缩合反应得到抗氨基醇8和顺氨基醇9,它们通过两种不同的途径转化为内酯6。6的烷基化,然后内酯开环,得到酸2a,其与胺3和5-甲基异恶唑-3-羧酸酯1分别偶联,以递送AG7088。