We recorded electroantennograms of male and female Lygocoris pabulinus antennae to 63 insect and plant volatiles. EAGs were between 100 and 500 mu V. Overall, male EAGs were about twice the size of female EAGs. In both sexes, largest EAGs were recorded to (E)-2-hexenyl butanoate and (E)-2-hexen-1-ol. Response profiles were similar in both sexes. However, male antennae were more sensitive to a number of esters, especially the butanoates and pentanoates. Female antennae were more sensitive to nine of the 19 plant volatiles, i.e., to hexan-1-ol, heptan-1-ol, 1-octen-3-ol, 2-heptanone, (R)-carvone, linalool, geraniol, nerol, and methyl salicylate. Sexual differences in responses suggest that males are more sensitive to insect-produced pheromone-type compounds, whereas females are more sensitive to plant compounds for their orientation towards oviposition sites.
[EN] COMPOUNDS FOR THE CONTROLLED RELEASE OF ACTIVE ALDEHYDES<br/>[FR] COMPOSES DESTINES A LA LIBERATION CONTROLEE D'ALDEHYDES ACTIFS
申请人:FIRMENICH & CIE
公开号:WO2003082850A1
公开(公告)日:2003-10-09
The present invention relates to the field of perfumery. More particularly, it concerns an aldoxane derivative of Formula (I) capable of protecting an active aldehyde R1CHO, for example a perfumery or flavor aldehyde, from a chemically aggressive medium into which they have to be added, and then of releasing said active aldehyde at the desired moment. The present invention concerns also the use of said compound in perfumery or in the flavor industry as well as the compositions or articles associated with said aldoxanes.
Studies of Intramolecular Cyclizations of <i>N</i>-Acyliminium Ions Derived from Acyclic Ketones: Unanticipated Stereochemical and Structural Results
作者:Wenchun Chao、Jacob H. Waldman、Steven M. Weinreb
DOI:10.1021/ol035046m
日期:2003.8.1
[reaction: see text] Intramolecular cyclizations of a series of (E)- and (Z)-olefinic acyclic ketone-derived N-acyliminium ions have been studied. It has been found that both the course of the reaction and the stereochemistry of the products are critically dependent upon the tether length and olefin geometry of the cyclization substrate.
Intramolecular [4 + 2] cycloadditions of nitroalkenes with olefins
作者:Scott E. Denmark、Michael S. Dappen、Christopher J. Cramer
DOI:10.1021/ja00266a036
日期:1986.3
Cycloadditions stereoselectives intramoleculaires en presence de SnCl 4 de nitro-1 nonadiene-1,7 et de nitro-2 decadiene-2,8: obtention d'oxydes-3 d'hexahydro-4a,5,6,7,8,8a benzooxazines-2,3
Cycloadditions 立体选择性分子内存在 de SnCl 4 de nitro-1 nonadiene-1,7 et de nitro-2 decadiene-2,8: 获得 d'oxydes-3 d'hexahydro-4a,5,6,7,8,8a benzooxazines -2,3
Intramolecular [4+2]-cycloadditions of nitroalkenes with olefins. 2
作者:Scott E. Denmark、Young-Choon Moon、Christopher J. Cramer、Michael S. Dappen、C.B.W. Senanayake
DOI:10.1016/s0040-4020(01)89054-2
日期:1990.1
The intramolecular [4+2]-cycloadditions of di- and trisubstituted nitroalkenes with unactivated olefins are described. The cycloadditions proceed readily at low temperatures in the presence of SnCl4. The reactions are shown to be stereospecific in the preservation of dienophile configuration in the product. The configuration of the heterodiene controls the stereochemistry of the ring fusion but the
Synthesis of Both Enantiomers of Brevioxime and Determination of Its Absolute Configuration
作者:Ken Ishigami、Yutaka Nishimura、Takeshi Kitahara
DOI:10.3987/com-03-s64
日期:——
Brevioxime is an inhibitor of juvenile hormone biosynthesis, isolated from Penicillium brevicompactum. We synthesized both enantiomers of brevioxime and determined the absolute configuration of natural product as S.