190520-68-4Relevant academic research and scientific papers
Synthesis method of foramsulfuron intermediate
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, (2021/01/04)
The invention discloses a synthesis method of a foramsulfuron intermediate, which comprises the following steps of: carrying out one-pot chlorination, alcoholysis and ammonolysis cyclization on 2-sulfo-4-nitrobenzoic acid used as a starting raw material t
Preparation method of foramsulfuron or foramsulfuron derivative intermediate
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, (2019/11/20)
The invention provides a preparation method of a foramsulfuron or foramsulfuron derivative intermediate. The preparation method is characterized in that saccharin used as a raw material undergoes ammonification and nitration reactions to obtain 2-dimethylaminocarbonyl-5-nitrobenzenesulfonamide that is the foramsulfuron intermediate. The foramsulfuron intermediate compound is prepared from the saccharin, so the method has the advantages of less pollution, low cost, few preparation reaction steps, mild reaction conditions, safety, easiness in operation, environmentally friendly production, and suitableness for large-scale industrial production. .
Processes for preparing aminophenylsulfonylureas, and intermediates therefor
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, (2008/06/13)
The invention relates to the preparation of compounds (I) in which A=H or acyl and R1, R21, R3, R, n, X, Y and Z are as defined in claim 1 by halogenation and rearrangement of compounds (II) (optionally salt) to
