351429-46-4Relevant academic research and scientific papers
Photodegradation of the isoxazolidine fungicide syp-z048 in aqueous solution: Kinetics and photoproducts
Liu, Pengfei,Xu, Yanjun,Li, Jianqiang,Liu, Junli,Cao, Yongsong,Liu, Xili
, p. 11657 - 11663 (2012)
Previous research has demonstrated that 3-[5-(4-chlorophenyl)-2,3-dimethyl- 3-isoxazolidinyl]pyridine (SYP-Z048), a newly developed nitrogen heterocycle substituted isoxazolidine compound, has good protective and curative activities against a wide range of fungal diseases of fruits and vegetables caused by Ascomycetes, Basidiomycetes, and Deuteromycetes. In this study, the photochemical behavior of SYP-Z048 was investigated in aqueous solution and in response to solar and low-pressure mercury ultraviolet (UV) lamp irradiation. SYP-Z048 photolysis was pH- and temperature-dependent and was described by a first-order degradation reaction. A total of 11 photoproducts were separated by high-performance liquid chromatography (HPLC) and solid-phase extraction (SPE) and were identified on the basis of 1H and 13C nuclear magnetic resonance (NMR) and high-performance liquid chromatography-mass spectrometry (HPLC-MS) spectra. The photoproduct structures and kinetics suggested that the phototransformation of SYP-Z048 occurred via multiple reaction pathways that included the cleavage of the N-O bond in the isoxazolidine ring and the dechlorination of the benzene ring.
