The stereoselective preparation of fullerene bis-adducts through nontethered methods remains difficult due to the significant amount of regioisomers produced. The trans-4 aziridino[60]fullerenes, C60(NC6H4R)n (n = 1 or 2, R = OMe, OEt, OBu), were selectively synthesized even without a catalyst by reacting octabromofullerene with the corresponding aniline. Nuclear magnetic resonance spectroscopy, UV-vis spectroscopy, and X-ray structural analysis provided convincing characterization of the compounds. A possible reaction process was proposed to clarify the synthesis of highly regioselective trans-4-bisaziridino[60]fullerenes. The possible use of these aziridino[60]fullerene derivatives as propellant stabilizers was also explored.