CO[C:3](OC)=[N:4][NH:5][C:6]([O:8][CH3:9])=[O:7].[CH3:12][NH2:13].[CH3:14][OH:15]>>[CH3:14][O:15][CH2:12][NH:13][CH:3]=[N:4][NH:5][C:6]([O:8][CH3:9])=[O:7]0.95 g (5.00 mmol) of methyl N′-dimethoxymethylenehydrazinecarboxylate (85% pure) was admixed with 3.57 g of a 44% strength solution of methylamine (50 mmol) in methanol, and the mixture was stirred at room temperature for 3 days. Work-up and removal of the solvent gave 0.85 g (76%) of methyl N′-(methoxymethylaminomethylene)hydrazinecarboxylate in the form of an oil.
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