Evidence map›Paper›PMID 42031996›Full record

ArticleScientific reports2026

Exploring insecticidal activity and SAR study of newly synthesized Benzo[h]quinoline-based heterocycles against Aphis craccivora Koch. and Culex pipiens L. Larvae.

Eman A E El-Helw, Doaa R Abdel-Haleem, Ali Kh Khalil, Sayed K Ramadan

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Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Eman A E El-HelwChemistry Department, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt.
Doaa R Abdel-HaleemEntomology Department, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt.
Ali Kh KhalilChemistry Department, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt.
Sayed K RamadanChemistry Department, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt. sayed.karam2008@sci.asu.edu.eg.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The key material, 2-chlorobenzo[h]quinoline-3-carbaldehyde condensed with various active-methylene reagents to produce some benzo[h]quinoline-based heterocycles like pyrazolone, imidazolone, thiazolidine, pyrimidinone, and indolinone candidates. The insecticidal activities of synthesized substrates were evaluated against cowpea aphid, Aphis craccivora, adults and common house mosquito, Culex pipiens larvae. The results of toxicological bioassays demonstrated that compounds 9 and 11, containing 2-thioxoimidazolidine and 2-thioxothiazolidine core, exhibited high insecticidal activity against A. craccivora adults with LC50s of 3.54 and 3.87 µg/mL, and against C. pipiens larvae with LC50s of 1.61 and 1.83 µg/mL, respectively. Schiff base 7 and arylidene 5 (bearing pyrazolone scaffolds) achieved good potencies with low LC50 values of 4.40 and 5.25 µg/mL for A. craccivora adults, and 2.16 and 2.49 µg/mL for C. pipiens larvae, respectively. On the other hand, the bulky pyrimidinetrione 16 and indolone 18 showed low toxicities. Overall, the tested substrates were more effective against C. pipiens larvae than A. craccivora adults. The current study highlighted the effect of the inserted function groups on 2-chlorobenzo[h]quinoline core on the compounds’ activity through the structure-activity relationship (SAR) study. This study presents promising results for the development of novel and effective insecticides to be integrated into pest control programs.

Indexed as

AphidsCulexInsecticidesQuinolinesStructure-Activity RelationshipAnimalsImidazolesLarvaPyrazolonesbenzo(h)quinolineImidazolesimidazoloneInsecticidespyrazolonePyrazolonesQuinolinesAphis craccivoraBenzo[h]quinolinesCulex pipiensInsecticidal activityPyrazolonesThiazolidines

Identifiers

PMID42031996
PMCPMC13109357

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.