作者:Tim G. Elford、Dennis G. Hall
DOI:10.1021/ja9104478
日期:2010.2.10
medicine. The first enantioselective total synthesis of (+)-chinensiolide B was accomplished in 15 steps for the longest linear sequence with an overall yield of 6.7% starting from inexpensive and readily available (R)-carvone. A highly stereoselective and E/Z-selective tandem allylboration/lactonization reaction between two highly functionalized partners was exploited as a key step. The synthesis also highlights
chinensiolides 是最近从中国民间医学中使用的植物 Ixeris chinensis Nakai 中分离出来的愈创木酚型 α-亚甲基 γ-内酯天然产物家族。(+)-chinensiolide B 的第一个对映选择性全合成在 15 个步骤中完成,最长的线性序列从廉价且容易获得的 (R)-香芹酮开始,总产率为 6.7%。两个高度官能化的伙伴之间的高度立体选择性和 E/Z 选择性串联烯丙基硼化/内酯化反应被用作关键步骤。该合成还强调了由反应性 α-亚甲基 γ-内酯引起的化学选择性问题的几种解决方案。例如,