120739-62-0Relevant articles and documents
Degradation of the neonicotinoid insecticide acetamiprid via the N-carbamoylimine derivate (IM-1-2) mediated by the nitrile hydratase of the nitrogen-fixing bacterium Ensifer meliloti CGMCC 7333
Zhou, Ling-Yan,Zhang, Long-Jiang,Sun, Shi-Lei,Ge, Feng,Mao, Shi-Yun,Ma, Yuan,Liu, Zhong-Hua,Dai, Yi-Jun,Yuan, Sheng
, p. 9957 - 9964 (2014)
The metabolism of the widely used neonicotinoid insecticide acetamiprid (ACE) has been extensively studied in plants, animals, soils, and microbes. However, hydration of the N-cyanoimine group in ACE to the N-carbamoylimine derivate (IM-1-2) by purified microbes, the enzyme responsible for this biotransformation, and further degradation of IM-1-2 have not been studied. The present study used liquid chromatography-mass spectrometry and nuclear magnetic resonance spectroscopy to determine that the nitrogen-fixing bacterium Ensifer meliloti CGMCC 7333 transforms ACE to IM-1-2. CGMCC 7333 cells degraded 65.1% of ACE in 96 h, with a half-life of 2.6 days. Escherichia coli Rosetta (DE3) overexpressing the nitrile hydratase (NHase) from CGMCC 7333 and purified NHase converted ACE to IM-1-2 with degradation ratios of 97.1% in 100 min and 93.9% in 120 min, respectively. Interestingly, IM-1-2 was not further degraded by CGMCC 7333, whereas it was spontaneously hydrolyzed at the N-carbamoylimine group to the derivate ACE-NH, which was further converted to the derivative ACE-NH2. Then, ACE-NH2 was cleaved to the major metabolite IM-1-4. IM-1-2 showed significantly lower insecticidal activity than ACE against the aphid Aphis craccivora Koch. The present findings will improve the understanding of the environmental fate of ACE and the corresponding enzymatic mechanisms of degradation.
METHOD FOR PURIFYING 1-(6-CHLOLOPYRIDINE-3-YL)-N-METHYLMETHANAMINE
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Paragraph 0046-0053, (2021/03/09)
The present application provides a method for purifying 1-(6-chloropyridin-3-yl)-N-methylmethanamine. It is possible to obtain 1-(6-chloropyridin-3-yl)-N-methylmethanamine with high purity.
A synthetic N - (6 - chloro -3 - pyridylmethyl) improved process for - methylamine
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Paragraph 0023-0028, (2017/04/05)
The invention discloses an improved process for synthesizing N-(6-chloro-3-picolyl)-methylamine. The improved process comprises the following steps of: adding toluene and monomethyl amine gases into a reaction kettle; cooling to 5 DEG C below zero to 5 DEG C; dropwise adding a 2-chloro-5-chloromethylpyridinetoluene solution to generate N-(6-chloro-3-picolyl)-methylamine; washing with water and delaminating; and removing toluene from an oil layer by distilling to obtained refined N-(6-chloro-3-picolyl)-methylamine. The method disclosed by the invention has the advantages of reduction in raw material using amount, reduction in transportation cost, environment-friendly synthesis process, small amount of produced waste water, high product purity and suitability for industrial production.