作者:Tadashi Kikukawa、Motomasa Imaida、Akira Tai
DOI:10.1246/bcsj.57.1954
日期:1984.7
In order to establish the stereochemistry of the sex attractant of various species of pine sawflies, (2S,3R,7R)-, (2S,3R,7S)- and (2S,3S,7S)-2-acetoxy- and 2-propionyloxy-3,7-dimethylpentadecane were synthesized. The alcohol moiety of each pheromone was prepared by the coupling of Grignard reagent of C12 block with tosylate of C5 block. The C12 blocks, (R)- and (S)-1-bromo-2-methylundecane, were prepared from (R)-(+)-pulegone. The C5 blocks, (2R,3S)- or (2S,3S)-2-methyl-3-tetrahydropyranyloxy-1-(tosyloxy)butane, were derived from (2S,3S)- or (2R,3S)-2-methyl-3-hydroxybutyric acid prepared by the enantio-differentiating hydrogenation of methyl 2-methyl-3-oxobutyrate over the asymmetrically modified nickle catalyst.
为了确定不同种类松锯齿蝇性引诱剂的立体化学结构,合成了(2S,3R,7R)-、(2S,3R,7S)-和(2S,3S,7S)-2-乙酰氧基和 2-丙酰氧基-3,7-二甲基十五烷。每种信息素的醇分子都是通过 C12 嵌段的格氏试剂与 C5 嵌段的甲苯磺酸盐偶联制备的。C12 嵌段(R)-和(S)-1-溴-2-甲基十一烷是由(R)-(+)-pulegone 制备的。(2R,3S)-或(2S,3S)-2-甲基-3-四氢吡喃氧基-1-(对甲苯磺酰氧基)丁烷等 C5 嵌段是由(2S,3S)-或(2R,3S)-2-甲基-3-羟基丁酸在不对称改性镍催化剂上通过 2-甲基-3-氧代丁酸甲酯的对映异构加氢反应制备的。