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To discover new agrochemicals with prominent pesticidal properties, a series of novel  β -naphthol derivatives containing benzothiazolylamino and various heteroaryl groups ( 8a-q ) were efficiently synthesised  via  Betti reaction. The bioassay results showed that most of the synthesised compounds exhibited favourable insecticidal potentials, particularly towards oriental armyworm (50–100% at 200 mg·L −1 ) and diamondback moth (50–95% at 10 mg·L −1 ). Compounds  8 b ,  8f ,  8 g ,  8j ,  8k ,  8n , and  8o  possessed LC 50  values of 0.0988–5.8864 mg·L −1  against diamondback moth. Compounds  8i ,  8 l , and  8 m  also displayed lethality rates of 30–90% against spider mite at the concentration of 100 mg·L −1 . Overall, some compounds could be considered as new insecticidal/acaricidal leading structures for further investigation. The calcium imaging experiments revealed that  8 h ,  8i , and  viii  could activate the release of calcium ions in insect ( M. separata ) central neurons at a higher concentration (50 mg·L −1 ). The SAR analysis provided valuable information for further structural modifications.

Synthesis and evaluation of novel 1-(((6-substitutedbenzo[ d ]thiazol-2-yl)amino)(heteroaryl)methyl)naphthalen-2-ol as pesticidal agents