A Flexible Stereocontrolled Synthesis of β-Hydroxy-α-methyl Esters: Application to the Synthesis of Stegobiol and Serricorole
作者:Pilar Gil、Jesús Razkin、Alberto González
DOI:10.1055/s-1998-2052
日期:1998.4
β-Hydroxy-α-methyl esters have been obtained in a stereocontrolled manner and high enantiomeric and diastereomeric purity from commercially available methyl 3-oxopentanoate and methyl 3-oxobutanoate. The key step is the catalytic hydrogenation of the carbonyl group using (R)- or (S)-BINAP-Ru as chiral catalyst followed by asymmetric alkylation. Stegobiol and serricorole, components of the sex pheromone of the drugstore beetle, Stegobium paniceum (L.) and cigarette beetle, Lasioderma serricorne (F.), have been prepared from these chiral building blocks without the need for stoichiometric amounts of chiral auxiliaries.
利用市售的甲基3-氧代戊酸酯和甲基3-氧代丁酸酯,可以通过立体控制的方式合成具有高对映异构体纯度和非对映异构体纯度的β-羟基-α-甲酯。关键步骤是使用手性催化剂(R)-或(S)-BINAP-Ru对羰基进行催化氢化,随后进行不对称烷基化。药物甲虫(Stegobium paniceum L.)和烟甲虫(Lasioderma serricorne F.)的性信息素成分Stegobiol和Serricorole就是从这些手性构建模块中合成的,无需使用等量的手性辅助剂。