METHOD OF SYNTHESIS OF 1,5-DINITRO-3,7-ENDO-METHYLENE-1,3,5,7- TETRAZACYCLOOCTANE Russian patent published in 2003 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method of synthesis of cyclic nitroamines. Invention describes method of synthesis of 1,5-dinitro-endomethylene-1,3,5,7-tetrazacyclooctane. Method involves interaction of urea derivatives with methylolating agent, their decarboxylation followed by neutralization with aqueous ammonia and isolation of the end substance. Urea is used as the parent substance for synthesis of its derivatives and urea is treated with a mixture of sulfuric and nitric acids taken in the mass ratio = 1:(5- 10) at temperature 20 C - 20 C followed by successive mixing the prepared reactive mass with water at temperature 20 C, not above, with methylolating agent at temperature 0=60 C and ammonia at temperature 0-25 C. Formaldehyde or urotropin is used as a methylolating agent. Invention provides synthesis of the end substance based on available raw. EFFECT: improved method of synthesis, increased yield. 3 tbl