Synthesis and Characterization of Blowing Agents and Hypergolics

Twelve energetic additives 7–18 were synthesized and evaluated for use as blowing agents. All blowing agent candidates were characterized by NMR spectroscopy, elemental analysis, differential scanning calorimetry, thermogravimetric analysis, and impact sensitivity testing. The X-ray crystal structure of pyrazolium nitrate was also determined. Hypergolic compounds: imidazolidine 38a, hexahydropyrimidine 38b, and pyrrolidine derivatives 42 were obtained in improved 80–90% yields by the reduction of the corresponding carbonyl compounds with lithium aluminum hydride in ether under reflux for 12 h