An Efficient Synthetic Method for 2,5,7,9-Tetranitro-2,5,7,9-tetraazabicyclo[4.3.0]nonane-8-one

A facile and efficient method for the synthesis of 2,5,7,9-tetranitro-2,5,7,9-tetraazabicyclo[4.3.0]nonane-8-one has been developed in this article. In the procedure, the precursor compound 2,5,7,9-tetrahydro-2,5,7,9-tetraazabicyclo[4.3.0]nonane-8-one dihydrochloride was prepared in high yields catalyzed by task-specific ionic liquids, and subsequent nitration of the precursor compound gave the desired product. The catalysts can be reused without obvious loss of the catalytic activity.