Cover Picture: The Evaluation of Secondary Amine Protecting Groups for Nitration (Prop., Explos., Pyrotech. 10/2019)

The Evaluation of Secondary Amine Protecting Groups for Nitration The cover picture shows the latest study on nitration of amides into nitramines. The yields of nitramines have been found to correlate with the stability of the resulting acylium ion and the steric bulk of the amide. A new amide, with cyclopropyl substituent, has been found to give higher yields than any previously known amide. The amide groups have been found to be nitrolyzable in the following order: Cyclopropyl>Ethyl>Propyl>Methyl>i‐Propyl≈t‐Butyl≈Methoxymethyl≫Hydrogen>Pentafluorophenyl. More details are discussed in the Full Paper by Andrew P. Chafin, Jeffrey Bottaro, and Kyle E. Rosenkoetter on page 1226 ff.