Synthesis of (�)-cis-tetradec-5-en-4-olide ? The racemate of the sex pheromone of the Japanese beetle
作者:G. G. Melikyan、D. A. Mkrtchyan、K. V. Lebedeva、U. Yu. Mya�org、G. A. Panosyan、Sh. O. Badanyan
DOI:10.1007/bf00574803
日期:——
A three-stage method has been developed for the stereoselective synthesis of (±)-cis-tetradec-5-en-4-olide — the racemate of the sexpheromone of the Japanese beetlePopillia japonica C. The key reactions used were the stereoselective cis reduction of a triple bond with the aid of heterogeneous hydrogenation catalysts (zinc-copper couple, nickel boride, Lindlar catalyst) and the radical lactonization
已经开发了一种用于立体选择性合成 (±)-cis-tetradec-5-en-4-olide — 日本甲虫 Popillia japonica C 的性信息素的外消旋体的三步法。使用的关键反应是立体选择性顺式借助多相氢化催化剂(锌铜对、硼化镍、林德拉催化剂)还原三键,并在乙酸锰存在下通过乙酸作用使共轭体系自由基内酯化。
Methods of producing optically active hydroxyesters
申请人:Nitto Denko Co. Ltd.
公开号:EP0435293A2
公开(公告)日:1991-07-03
This invention relates to methods for producing optically active hydroxyesters and also to methods for producing and purifying optically active five-membered ring lactones.
More specifically, the invention provides methods for efficiently, safely, and selectively producing and purifying optically active (R)-hydroxyester (shown by formula 1) and optically active (S)-hydroxyester (shown by formula 2) in high state of purity at ordinary temperature.
The invention also relates to application of the inter-convertible optically active (R)-five-membered ring lacton (shown by formula 5).
They are intermediates for synthesizing various medicines, agricultural chemicals, and biologically active substances, however especially useful for synthesizing pheromone of a noxious insect, Popillia japonica Newman.
(Here,R₁ denotes -C≡C-R₃ or -C=C-R₃; R₂ and R₃ denote straight chain or branched alkyl groups containing 1 to 10 carbon atoms; R₄ denotes alkyl groups, aralkyl groups, or haloalkyl groups containing 1 to 12 carbon atoms and the end group of R₄ may be carboxyl groups; * denotes asymmetricrbon atoms.)