In a search of new biologically active compounds, in the present communication we describe the synthesis of N-(Δ8-bicyclohomofarnesenoyl)-Nʹ-Δ(6,8-bicyclohomofarnesenoyl)hidrazine (4), N-(Δ8-bicyclohomofarnesenoyl)-Nʹ-benzoyl-hidrazine (6) and 2-phenyl-5-(Δ8bicyclohomofarnesenyl)-1,3,4-thiadiazole (7) from commercially available norambreinolide (1), according to the scheme: Reagents and conditions: a. P2S5, Et3N, T3P, EtOAc, Δ, 10 h; b. Vilsmeier reagent, Et3N, Lawessonʹs reagent, THF, 20°C, 20 h. Dihydrazide (4) was obtained by interaction of Δ8-bicyclohomofarnesoic acid hydrazide (2) with Δ6,8-bicyclohomofarnesoic acid (3). Reaction of hydrazide (2) with benzoic acid lead to dihydrazide (6) and 2-phenyl-5-(Δ8-bicyclohomofarnesenyl)-1,3,4-thiadiazole (7). The structures of the newly obtained compounds were established on the basis of their spectral date (IR, 1H- and 13C-NMR, mass-spectra).