1,5-Diphenylpentan-1-one

Pest Manag Sci. 2001 Mar;57(3):307-10.

Activity of the botanical aphicides 1,5-diphenyl-1-pentanone and 1,5-diphenyl-2-penten-1-one on two species of Aphididnae.[Pubmed: 11455662]

1,5-Diphenyl-1-pentanone (1,5-Diphenylpentan-1-one, A) and 1,5-diphenyl-2-penten-1-one (B) are natural products extracted for the first time from Stellera chamaejasme.
METHODS AND RESULTS:
Laboratory bioassay showed that the two products have strong contact activity and very good anti-feedant activity against Aphis gossypii and Schizaphis graminum. Both products showed dose-dependent relationships for both forms of activity against the two aphids, the contact activity of B being about twice that of A. Both products were inferior to methomyl in contact activity but superior in anti-feedant activity against the two aphids.
CONCLUSIONS:
This is the first report of aphicidal activity in these two compounds, which may represent a new class of aphicide.

Chem Biol Drug Des. 2011 Jul;78(1):94-100.

Design, synthesis, and bioactivities screening of a diaryl ketone-inspired pesticide molecular library as derived from natural products.[Pubmed: 21457470]

METHODS AND RESULTS:
Three natural products, 1,5-Diphenylpentan-1-one, 1,5-diphenylpent-2-en-1-one, and 3-hydroxy-1,5-Diphenylpentan-1-one, with good insecticidal activities were extracted from Stellera chamaejasme L. Based on their shared diaryl ketone moiety as 'pharmacophores', a series of diaryl ketones were synthesized and tested for insecticidal activity, acetylcholinesterase inhibitory activity, and antifungal activity. All synthesized compounds showed poor insecticidal and acetylcholinesterase inhibitory activities. Compound III with a furyl ring showed strong activities against plant pathogenic fungi.
CONCLUSIONS:
The IC(50) of compound (E)-1-(2,4-dichlorophenyl)-3-(furan-2-yl)- -prop-2-en-1-one (III(2) ) was 1.20 mg/L against Rhizoctonia solani, suggesting its strong potential as a novel antifungal drug.