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• W2918601905 endingPage "5933" @default.
• W2918601905 startingPage "5922" @default.
• W2918601905 abstract "Abstract 4‐Nitropyrazolin‐5‐ones have been synthesized by the nitration of pyrazolin‐5‐ones at room temperature by employing the Fe(NO 3 ) 3 /NaNO 2 system. The method demonstrated selectivity towards the 4‐position of pyrazolin‐5‐ones even in the presence of NPh and allyl substituents, which are sensitive to nitration. It was shown that other systems containing Fe III and nitrites, namely Fe(NO 3 ) 3 / t BuONO, Fe(ClO 4 ) 3 /NaNO 2 , and Fe(ClO 4 ) 3 / t BuONO, were also effective. Presumably, Fe III oxidizes the nitrite (NaNO 2 or t BuONO) to form the NO 2 free radical, which serves as the nitrating agent for pyrazolin‐5‐ones. The synthesized 4‐nitropyrazolin‐5‐ones were discovered to be a new class of fungicides. Their in vitro activities against phytopathogenic fungi were found comparable or even superior to those of commercial fungicides (fluconazole, clotrimazole, triadimefon, and kresoxim‐methyl). These results represent a promising starting point for the development of a new type of plant protection agents that can be easily synthesized from widely available reagents." @default.
• W2918601905 created "2019-03-11" @default.
• W2918601905 creator A5011872408 @default.
• W2918601905 creator A5029681803 @default.
• W2918601905 creator A5042481011 @default.
• W2918601905 creator A5061455972 @default.
• W2918601905 creator A5087377887 @default.
• W2918601905 date "2019-03-29" @default.
• W2918601905 modified "2023-10-10" @default.
• W2918601905 title "Mild Nitration of Pyrazolin‐5‐ones by a Combination of Fe(NO ₃ ) ₃ and NaNO ₂ : Discovery of a New Readily Available Class of Fungicides, 4‐Nitropyrazolin‐5‐ones" @default.
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