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Culex mosquito, pheromone

Based on the previous work of this group on the three-component aza[4+2]/ allylboration strategy to construct polysubstituted piperidines [62], Gao and Hall developed a catalytic enantioselective version [63] of the corresponding oxygeneous process to construct a-hydroxyalkylated pyrans from 3-boronoacrolein [64], This recent variant of a Vaultier-Lallemand one-pot three-component reaction (see Scheme 12.14) was successfully applied to a concise total synthesis of (5R,6S)-6-acetoxy-5-hexadecanolide 128 (Scheme 12.20), the oviposition attractant pheromone of the female Culex mosquito [65] capable of transmitting the West Nile virus. [Pg.366]

A methodologically similar approach was successfully utilized independently for the synthesis of the oviposition attractant pheromone of the female Culex mosquito (—)-(5/ ,6S )-6-acetoxyhexadecanolide (28), by Kotsuki et al. 45) and Li et al. 46). While the Li group carried out a direct aldol reaction between undecanal (23) and cyclopentanone (24) to obtain the desired isomer 25 in excellent enantio- and diastereoselectivity, the Kotsuki group introduced the stereogenic centers by a reaction between 24 and the dithiane 26 under solvent-free conditions (Scheme 7). [Pg.16]

Mosquito (Culex quinquefasciatus C. tarsalis) responses Likely attractant for predators on insect herbivores (OD-R) Ant (Formica lugubris) male pheromone Mosquito (Culex quinquefasciatus,... [Pg.450]

Turning to detritivores, several species of Culex and Aedes mosquitoes are attracted to potential oviposition sites or stimulated to oviposit by pheromones emitted by conspecific eggs, larvae, or pupae (Mulla, 1979). Presumably such pheromones indicate locales of comparatively ample resources which have proved favorable to recent development of conspecifics. On the other hand, larvae of some of these same species, when overcrowded, emit chemicals which are toxic or growth-retarding to conspecifics (Mulla, 1979). How these two facets of chemical regulation of mosquito egg and larval density relate to one another and to individual fitness is uncertain and merits further study. [Pg.316]


See other pages where Culex mosquito, pheromone is mentioned: [Pg.44]    [Pg.450]    [Pg.32]    [Pg.243]    [Pg.134]    [Pg.134]    [Pg.44]    [Pg.334]    [Pg.1270]   
See also in sourсe #XX -- [ Pg.9 ]




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