1: dimethyl sulfoxide With phosgene in dichloromethane T=-78°C; 0.25 h; Inert atmosphere; 2: With triethylamine in dichloromethane T=-78°C; 0.5 h; 3: 3-(5-methyl-2-furanyl)-1-propanol in dichloromethane T=-78 - -25°C; 1.5 h;

1: 3-(5-methyl-2-furanyl)-1-propanol With sulfur trioxide pyridine complex; triethylamine in dimethyl sulfoxide T=0°C; 1 h; 2: carbon tetrabromide With triethylamine; triphenylphosphine in dichloromethane T=-20 - 20°C; 3: With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.166667 h; Further stages.;

1: benzenesulfonyl chloride; pyridine / Erwaermen des Reaktionsprodukts mit Natriumcyanid in wss. Methanol 2: aq. NaOH solution 3: phosphorus (V)-chloride / anschliessend Behandeln mit Zinn(IV)-chlorid in Benzol View Scheme