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Reagents and conditions: (a) Ac2O, HClO4; (b) piperazine, THF; (c) NCCCl3, K2CO3, CH2Cl2; (d) 3-Chloro-1-propanol, TMSOTf, CH2Cl2, -20°C to rt; (e) NaN3, DMF, 80°C; (f) NH3 / CH3OH; (g) Ph3P, THF, 75°C, reflux; (h) K2CO3, Alkyl Bromide, C2H5OH, CH3OH, 70°C; (i) CH3I, THF.
