3-(Piperidin-4-yl)-6,7-dihydro-5H-pyrrolo[2,1-c][1,2,4]triazole　was　synthesized　through　a　four-step　process　including　etherification,　hydrazonation,　cyclization,　and　reduction　with　an　overall　yield　of　39%.　The　final　product　was　characterized　by　H-1　NMR　and　ESI-MS/MS.　The　molecular　structures　of　benzyl　(Z)-4-(2-(pyrrolidin-2-ylidene)hydrazine-1-carbonyl)piperidine-1-carboxylate　and　related　compounds　were　analyzed　using　DFT　calculations　at　the　B3LYP/6-311+G(d,p)　level　of　theory.　The　results　indicated　a　higher　stability　of　the　hydrazone　tautomers.