Tetrahydropyran Esters as New Attractants for Cockroaches

Synthesis and Bioevaluation of Alicyclic and Heterocyclic Alkanoates as Cockroach Attractants

“…Second, it may be of interest to compare the structure-activity correlation of these compounds with that of the tetrahydropyran esters reported earlier. 3) The attractant activity exhibited by these compounds is presented in Tables I and II. Perusal of these data indicate a striking feature: while more than 50% of the heterocyclic compounds (tetrahydrofurfuryl and tetrahydropyranyl derivatives) were slightly active against one species or the other, there was only one compound from the cyclohexyl and cyclopentyl series which showed attractant activity of particular significance.…”

“…This criterion is almost fulfilled by only one compound, namely tetrahydrofurfuryl heptanoate, against B. germanica. To evaluate its potential further, this compound was compared with propyl cyclohexaneacetate and methyl tetrahydropyran-4-carboxylate 3 ) under identical experimental conditions. The results show that tetrahydrofurfuryl heptanoate was comparable in its activity with the cyclohexane ester and had a definite edge over methyl tetrahydropyran-4-carboxylate.…”

Synthesis and Resolution of Tetrahydropyran Carboxylic Acids and the Bioevaluation of Their Esters as Cockroach Attractants

“…This has been the case with racemic mixtures too. 4 ) Comparatively, the ( isomer of 1 displayed better activity than its optical antipode, both in terms of attractancy index and by eliciting a positive response over a range of applied quantity. Surprisingly, the racemic mixture was active only between 0.01 and 0.05 III and not at greater volumes.…”

“…4 ) From the results, it appeared that carboxylates generally exhibited better attractancy than their acetates and propionates. Since tetrahydropyran-2-and -3-carboxylic acids have a chiral centre, attempts were made to separate them into optical isomers.…”

Evaluation of Attractants for Monitoring Populations of the German Cockroach (Dictyoptera: Blattellidae)

“…Among them, fatty acids and esters (Tsuji 1966, Wileyto andBoush 1983), cyclohexylalkanoates and n-alkylcyclohexaneacetates (Sugawara et al 1975, Wileyto andBoush 1983), and tetrahydropyran esters (Pandey et al 1994(Pandey et al , 1995 have been evaluated. In addition, various household food materials (Tsuji 1965, Reierson and Rust 1977, Rust and Reierson 1981, Ballard and Gold 1982 and insecticide baits Reierson 1981, Scharf et al 1994;G.N.…”