Convergent and enantioselective syntheses of both enantiomers of (5Z)-tetradecen-4-olide, scarab beetle pheromones
摘要:
Japonilure and its enantiomer, that is, (R)-(-)- and (S)-(+)-(5Z)-tetradecen-4-olide, have been synthesised in satisfactory overall yields using a highly convergent procedure. In situ prepared 1-decynylethylzine was enantioselectively coupled to isopropyl 4-oxobutanoate in the presence of (S)- or (R)-BINOL. The alkoxy-ester intermediates obtained were cyclised to the corresponding substituted gamma-lactones, carrying a triple bond in the side chain. Lindlar-hydrogenation of the latter yielded the target compounds. (c) 2006 Elsevier Ltd. All rights reserved.
Preparation of Enantiomerically Enriched Compounds Using Enzymes; VII.1A Synthesis of Japanese Beetle Pheromone Utilizing Lipase-Catalyzed Enantioselective Lactonization
Asymmetric synthesis via axially dissymmetric molecules. 7. Synthetic applications of the enantioselective reduction by binaphthol-modified lithium aluminum hydride reagents
作者:R. Noyori、I. Tomino、M. Yamada、M. Nishizawa
DOI:10.1021/ja00334a042
日期:1984.10
La reaction est applicable a une variete decomposescarbonyles insatures de structures diverses tels que, cetones aromatiques, cetones acetyleniques, cetones ethyleniques et aldehydes. L'utilite est illustree parla synthese fortement stereocontrolee d'intermediaires de prostaglandines, de quelques pheromones d'insectes, d'alcools terpeniques primaires chiraux, de phenyloxiranne optiquement actif
La 反应 est 适用一个 une variete de composes carbonyles insatures destructures different tels que, cetones aromatiques, cetones acetyleniques, cetones ethyleniques et aldehydes。L'utilite est illustree par la synthese fortement Stereocontrolee d'intermediaires de prostaglandines, de quelques pheromones d'insectes, d'alcools terpeniques primaires chiraux, de phenyloxiranne optiquement actif...
Lipase-catalyzed kinetic resolution of methyl 4-hydroxy-5-tetradecynoate and its application to a facile synthesis of japanese beetle pheromone
solvent yields methyl (R)-4-succinoyloxy-5-tetradecynoate with over 90% e.e.. Furthermore, this optically active diester was converted to (R)-5-(1-decynyl)oxacyclopentan-2-one by lipase-catalyzed enantioselective lactonization which enhanced its e.e. over 99%. The Japanesebeetlepheromone (R,Z)-(-)-5-(1-decenyl)oxacyclopentan-2-one is synthesized in one step from this optically active lactone.