N-Nitroso-3-methylaminoisobutyl

The more important methods of preparation of diazomethane include those from nitrosomethylurea, nitrosomcthylurethane, N-nitroso-/3-methylaminoisobutyl methyl ketone, and 1-methyl-l-nitroso-3-nitroguanidine. ... 

N- Methy 1-2-methyl pyrroli ne, 94-95 Methyl 2-(4-nitrophenylazo)-1,3-indendi-one-2-carboxylate, 298 Ar-Methyl-Ar-nitroso-3,6-dinitroaniline, 432 Methyl N-nitroso-/3-methylaminoisobutyl ketone, 428... 

A. N-Nitroso-fi-methylaminoisobutyl methyl ketone. In a 2-1. three-necked flask, fitted with a mechanical stirrer, a thermometer, and a dropping funnel, is placed 250 ml. (2.1 moles) of 30% aqueous methylamine (Note 1). The flask is surrounded by an ice bath, and the stirrer is started. When the temperature of the solution has dropped to 5°, 196 g. (2 moles) of mesityl oxide is added through the dropping funnel at such a rate that the temperature remains below 20° (Notes 2 and 3). After the mesityl oxide has been added, the mixture is allowed to stand without cooling for 30 minutes. 

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