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Updated: May 6, 2026
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
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Structure-activity relationship observations oftrans-trimedlure enantiomers.
J D Warthen1, W F Schmidt, R E Doolittle
1Insect Chemical Ecology Laboratory, BARC-W, United States Department of Agriculture, Agricultural Research Service, 20705, Beltsville, Maryland.
Journal of Chemical Ecology
|November 16, 2013
Summary
This study investigated tert-Butyl 4- (and 5-) chloro-trans-2-methylcyclohexane-1-carboxylate (TML) isomers for attracting male Mediterranean fruit flies. Molecular modeling revealed structure-activity relationships crucial for developing effective medfly attractants.
Area of Science:
- Entomology
- Chemical Ecology
- Computational Chemistry
Background:
- tert-Butyl 4- (and 5-) chloro-trans-2-methylcyclohexane-1-carboxylate (TML) isomers are used to detect and monitor male Mediterranean fruit flies (medfly).
- Previous work established a quantitative structure-activity relationship (QSAR) linking TML molecular measurements to medfly captures.
Purpose of the Study:
- To perform computer-aided molecular modeling of trans-TML enantiomers.
- To determine common volumes and surface areas through fitting with the most attractive isomer, (1S,2S,4R)-TML-C.
- To report structure-activity relationships (SAR) based on molecular modeling and fitting.
Main Methods:
- Isolation of eight TML isomers (racemic mixtures) using High-Performance Liquid Chromatography (HPLC).
- Field determination of relative attractiveness of TML isomers.
- Computer-aided molecular modeling of trans-TML enantiomers using Chem-X software.
- Staggered and superimposed fitting of enantiomers with the most attractive isomer to analyze Van der Waals (VdW) maps.
Main Results:
- The study modeled trans-TML enantiomers and analyzed their interactions with the most attractive isomer.
- Common volumes and surface areas from Van der Waals maps were identified.
- Structure-activity relationships (SAR) were observed for staggered fittings, providing insights into medfly attraction.
Conclusions:
- Molecular modeling and SAR analysis of TML isomers offer a deeper understanding of medfly attractant mechanisms.
- These findings can guide the design of more effective attractants for Mediterranean fruit fly monitoring and control.
- Computational approaches are valuable for optimizing pest management strategies in agriculture.
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