作者:Shouyun Yu、Shaolin Zhu、Xianhua Pan、Jiade Yang、Dawei Ma
DOI:10.1016/j.tet.2010.12.068
日期:2011.3
Aldol reaction of 2,5-disubstituted pyrrolidine 3b with (R)-Garner aldehyde followed by Sharpless asymmetric dihydroxylation and other four reactions afforded mesylate 8a, which was introduced by an amide group via three ordinary transformations to provide amide 9a. Careful deprotection with AlCl3/Me2S and subsequent HPLC purification furnished kaitocephalin.
2,5-二取代的吡咯烷3b与(R)-加纳醛的Aldol反应,然后进行Sharpless不对称二羟基化反应和其他四个反应,得到甲磺酸盐8a,该甲磺酸盐由酰胺基经三个常规转化引入以提供酰胺9a。用AlCl 3 / Me 2 S小心地脱保护并随后进行HPLC纯化,得到的是海头脑素。