[N+:1]([C:4]1[CH:5]=[C:6]([CH:9]=[CH:10][CH:11]=1)[CH:7]=O)([O-:3])=[O:2].[NH2:12][OH:13]>O>[N+:1]([C:4]1[CH:5]=[C:6]([CH:9]=[CH:10][CH:11]=1)[CH:7]=[N:12][OH:13])([O-:3])=[O:2]To 5 l of water warmed at 50° C. was 453 g (3 mol) of m-nitrobenzaldehyde added and then, 218 g (3.3 mol) of a 50% aqueous solution of hydroxylamine (manufactured by Nisshin Kako) was added dropwise under stirring and further, stirred at the same temperature for 3 hours. Thereafter the mixture was cooled to room temperature, filtered, washed with water and dried. 488 g of m-nitrobenzaldoxime was obtained. Yield 98%; M.P. 118°-121° C.
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