Formal Synthesis of (-)-Frontalin through Diastereoselective Hydrocyanation of a β-Keto Sulfoxide
作者:Francisco Yuste、Benjamín Ortiz、Rubén Sánchez-Obregón、Rubén Toscano
DOI:10.1055/s-2008-1067120
日期:——
The diastereoselective synthesis of ( S)-4-(2,2,4-trimethyl-1,3-dioxolan-4-yl)butan-1-ol ( 9), an intermediate in the asymmetric synthesis of the pine beetle pheromone (-)-frontalin [(1 S,5 R)-1,5-dimethyl-6,8-dioxabicyclo[3.2.1]octane] ( 1), has been accomplished starting from the β-keto sulfoxide 2, derived from glutaric anhydride. The key step of the synthetic sequence is the diastereoselective
(S)-4-(2,2,4-trimethyl-1,3-dioxolan-4-yl)butan-1-ol ( 9) 的非对映选择性合成,它是松甲虫信息素不对称合成的中间体 ( -)-frontalin [(1 S,5 R)-1,5-dimethyl-6,8-dioxabicyclo[3.2.1]octane] (1),从衍生自戊二酸的 β-酮亚砜 2 开始酐。合成序列的关键步骤是二乙基氰化铝对2进行非对映选择性氢氰化。