1: 1) piperidine, 2) conc. H2SO4 / 1) pyridine 2: hydrogen / 5percent Pd/C / ethanol 3: sodium wire / diethyl ether / 18 h / Ambient temperature 4: 1) NaOMe / 1) MeOH, reflux, 45 min, 2) MeOH, reflux, 18 h View Scheme

1: hydrogen / 5percent Pd/C / ethanol 2: sodium wire / diethyl ether / 18 h / Ambient temperature 3: 1) NaOMe / 1) MeOH, reflux, 45 min, 2) MeOH, reflux, 18 h View Scheme

1: sodium wire / diethyl ether / 18 h / Ambient temperature 2: 1) NaOMe / 1) MeOH, reflux, 45 min, 2) MeOH, reflux, 18 h View Scheme

sodium methylate 1) MeOH, reflux, 45 min, 2) MeOH, reflux, 18 h; Yield given. Multistep reaction;

in ethanol 24 h; Heating;