TNAZ is a high explosive material that possesses a azetidine ring, which contains one nitramine and geminal dinitro groups. t-Butylamine was reacted with epichlorohydrin to give 1-t-butyl-3-hydroxyazetidine·HCl. When toluene was used as a solvent, and acid catalyst was necessary to reduce the reaction time. In addition, the reaction intermediate, amino alcohol 1, was isolated and the intermediate reaction was studied by varying the amount of solvent, temperature, and reaction time. Instead of 1-t-butyl-3-nitroazetidine, as the key intermediate for TNAZ, 1-t-butyl-3-hydroxymethyl-3-nitroazetidine was prepared from 1-t-butyl -3-hydroxyazetidine·HCl. The yield was comparable, but the work-up was easier than that of the known method.