Preparative Scale Syntheses of Isomerically Pure (10E,12E,14Z)- and (10E,12E,14E)-Hexadeca-10,12,14-trienals, Sex Pheromone Components of Manduca sexta
Insect sexpheromone analogs having a fluorine atom on their double bonds, (9E,11E)-1-acetoxy-9-fluorotetradecadiene, (10E,12E)-13-fluorohexadecadien-1-ol, (9Z,11E)-1-acetoxy-9-fluorotetradecadiene, (10E,12Z)-13-fluorohexadecadien-1-ol were stereoselectively synthesized using cross-coupling reactions of alkenylboranes with (E)- or (Z)-2-fluoro-1-iodo-1-alkenes, stereoselectively prepared from 1-alkynes
Preparation of (Z)- and (E)-vinyl selenides utilizing vinylboronic acids and vinylboronic esters in ionic liquids
作者:George W. Kabalka、Bollu Venkataiah
DOI:10.1016/s0040-4039(02)00610-x
日期:2002.5
Vinylboronic acids and vinylboronic esters react with phenylselenyl chloride in ionic liquids to generate vinyl selenides stereospecifically. (C) 2002 Elsevier Science Ltd. All rights reserved.
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作者:J. Steven McElfresh、Jocelyn G. Millar
DOI:10.1023/a:1020876229787
日期:——
The sex pheromone of Hemileuca eglanterina from the San Gabriel Mountains, California, was determined to be a combination of E10,Z12-hexadeca-10, 12-dien-1-yl acetate, E10,Z12-hexadeca-10, 12-dien-1-ol, and E10,Z12-hexadeca-10,12-dienal. Ratios of the compounds in extracts of female pheromone glands varied around a mean of 100:48: 1.1 of the acetate, alcohol, and aldehyde, respectively. Field trials with synthetic compounds indicated that the optimum ratio of alcohol to aldehyde was 10:1 and that this ratio was more critical than the ratio of either compound to the acetate. A synthetic blend of 100:10:1 acetate-alcohol-aldehyde was effective at attracting male moths in the field. Additional compounds found in both extract and aeration samples failed to significantly increase trap catches of male moths, although some of these minor components elicited responses from male moth antennae in coupled gas chromatography-electroantennography studies.