The high insecticidal activity and potency at the insect GABA-gated chloride channel of 4-alkyl-3-cyano-2,6,7-trioxabicyclo[2.2.2]octanes with the 1-(4-ethynylphenyl) substituent is also achieved with the corresponding l-(hex-5-ynyl) analogs. Conceptually the four-methylene linkage resembles the spatial characteristics of a phenyl ring and allows the ethynyl group to occupy the same area of receptor space as when attached at the 4-position of an aryl moiety. This is the first example of chloride channel blockers with the ability to replace a phenyl group by a conformationally flexible alkyl linkage and retain a significant portion of the activity.
The high insecticidal activity and potency at the insect GABA-gated chloride channel of 4-alkyl-3-cyano-2,6,7-trioxabicyclo[2.2.2]octanes with the 1-(4-ethynylphenyl) substituent is also achieved with the corresponding l-(hex-5-ynyl) analogs. Conceptually the four-methylene linkage resembles the spatial characteristics of a phenyl ring and allows the ethynyl group to occupy the same area of receptor space as when attached at the 4-position of an aryl moiety. This is the first example of chloride channel blockers with the ability to replace a phenyl group by a conformationally flexible alkyl linkage and retain a significant portion of the activity.
作者:Ian H. Smith、Timothy C. Budd、Jill. Sills、John E. Casida
DOI:10.1021/jf00031a020
日期:1993.7
The high insecticidal activity and potency at the insect GABA-gated chloride channel of 4-alkyl-3-cyano-2,6,7-trioxabicyclo[2.2.2]octanes with the 1-(4-ethynylphenyl) substituent is also achieved with the corresponding l-(hex-5-ynyl) analogs. Conceptually the four-methylene linkage resembles the spatial characteristics of a phenyl ring and allows the ethynyl group to occupy the same area of receptor space as when attached at the 4-position of an aryl moiety. This is the first example of chloride channel blockers with the ability to replace a phenyl group by a conformationally flexible alkyl linkage and retain a significant portion of the activity.