A process for preparing hexanitrohexaazaisowurtzitane

A process for the synthesis of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazatetracyclo [5.5.0.0. characterized by the following steps: - Stage 1: nitrosation of 4,10-dibenzyl-2,6,8,12-tetraacetyl-2,4,6,8,10,12-hexaazatetracyclo [5.5.0.0. and - Stage 2: nitration of the product obtained after step. 1