accomplished from readily available hex-5-yn-1-ol via Shi’s asymmetric epoxidation as the key step, in eight steps with an overall yield of 33.5%. In addition, the stereoselective synthesis of all four isomers of 6-acetoxy-5-hexadecanolide 1a–1d were obtained via Sharpless asymmetric dihydroxylation and Mitsunobu reaction as the key steps with overall yields of 16.5–21.2%, respectively.
(5不对称全合成小号,6 - [R(+) - - )赤-6-乙酰氧基-5-
十六内酯1A已经从容易得到己-5-炔-1-醇通过施的不对称环氧化反应完成的关键步骤,分八步进行,总产率为33.5%。此外,6-乙酰氧基-5-
十六内酯的所有四种异构体的立体选择性合成1A - 1D分别通过Sharpless不对称二羟基化和Mitsunobu反应得到分别作为具有16.5-21.2%的总产率的关键步骤。