Xue Qin

Synthesis and Biological Activities of Novel Pyrazole Oxime Derivatives Containing a 2-Chloro-5-thiazolyl Moiety

A series of novel pyrazole oxime derivatives containing a 2-chloro-5-thiazolyl moiety were synthesized. Their structures were confirmed by (1)H NMR, (13)C NMR, and elemental analysis. The preliminary bioassays showed that all of the title compounds had low acaricidal activity against Tetranychus cinnabarinus . However, most of them exhibited excellent insecticidal activity against Aphis medicagini at the dosage of 0.5 mg/mL, and some compounds still showed good insecticidal activity against A. medicagini even at the dosage of 0.2 mg/mL. Meanwhile, some title compounds displayed fungicidal and plant growth regulatory activities.

Synthesis and Insecticidal Activity of N-Substituted (1,3-Thiazole)alkyl Sulfoximine Derivatives

The N-substituted alkyl sulfoximine derivatives are a new chemical family of neonicotinoid insecticides. We have designed and synthesized 10 (1,3-thiazole)alkyl sulfoximine derivatives. All compounds were identified by (1)H and (13)C nuclear magnetic resonance (NMR), IR, and elemental analyses. Preliminary bioassays indicated that some title compounds exhibited good insecticidal activities at 10 mg/L against Myzus persicae . The relationship between structure and biological activity was also discussed.

Synthesis and herbicidal activities of 2-cyano-3-benzylaminoacrylates containing thiazole moiety.

Two series of novel 2-cyano-3-benzylaminoacrylates containing long-chain thiazole ring moiety were synthesized as herbicidal inhibitors of photosystem II (PS II) electron transportation. Their structures were confirmed by (1)H NMR and elemental analysis. The bioassay showed that these compounds retain high herbicidal activities and especially compounds 13a and 13h have excellent herbicidal activities.

1-Methyl-5-phen-oxy-3-trifluoro-methyl-1H-pyrazole-4-carbaldehyde oxime.

In the title compound, C12H10F3N3O2, the dihedral angle between the phenyl and pyrazole rings is 96.6 (3)°. In the crystal, pairs of O—H⋯N hydrogen bonds link the molecules, forming inversion dimers. Weak intermolecular C—H⋯F hydrogen bonds are also observed.