Sequential cross-metathesis/cyclopropanation: short syntheses of (+/−)-cascarillic acid and (+/−)-grenadamide
作者:Hani Salim、Olivier Piva
DOI:10.1016/j.tetlet.2007.01.152
日期:2007.3
The total synthesis of (+/−)-cascarillic acid has been achieved by a sequential cross-metathesis/Simmons–Smith cyclopropanation between, respectively, 1-octene with an appropriate unsaturated carboxylic acid. In parallel, a direct access to grenadamide was developed from 1-nonene with a readily available unsaturated amide. In both cases, the chemical yields were high (up to 98%) and the E/Z ratio was
(+/-)-香芹酸的总合成是通过在1-辛烯与适当的不饱和羧酸之间分别进行连续复分解/ Simmons-Smith环丙烷化而实现的。同时,从1-壬烯与一种容易获得的不饱和酰胺开发了直接接触格林纳丁胺的方法。在这两种情况下,化学收率都很高(高达98%),E / Z比接近80/20。也已经考虑了二溴环丙烷类似物的合成。