SECONDARY NITRAMINE SYNTHESIS METHOD Russian patent published in 2010 - IPC C07C243/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for synthesis of secondary nitramines of general formula RR¹NNO₂, where R-R¹=CH₃, C₂H₅, C₃H₇, n-C₄H₉, i-C₄H₉, O₂NOCH₂CH₂, or R+R¹=CH₂CH₂OCH₂CH₂, (CH₂)₅, CH₂CH₂N(NO₂)CH₂CH₂, through nitration of corresponding secondary amines with a mixture of nitric acid and acetic anhydride in the presence of a zinc chloride catalyst at temperature 20-40°C. The method is distinguished by that, the process is carried out in a carbon dioxide medium at pressure of 80-100 atm. Secondary nitramines are used as herbicides, effective plant growth stimulants, antiseptics, additives to lubricating oils and fuel, as well as in the defense industry.

EFFECT: increased fire- and explosion safety of the process, improved environmental characteristics of the process, increased output of end products, as well as suppression of the secondary process of formation of N,N-dialkylacetamides.

3 cl, 19 ex