1: lithium aluminium tetrahydride / tetrahydrofuran; diethyl ether / 1 h / 0 °C / |Reflux 2: ReOCl3(SMe2)(OPPh3) / benzene / 72 h / 0 °C 3: tetrabutyl ammonium fluoride / tetrahydrofuran 4: ReOCl3(SMe2)(OPPh3) / benzene / 60 h / 0 °C 5: LiDBB / tetrahydrofuran / 0.25 h / -20 °C 6: 1H-imidazole / N,N-dimethyl-formamide / 40 h / 20 - 50 °C 7: triphenylphosphine hydrobromide / chloroform / 24 h / 20 °C / |Molecular sieve 8: ammonium fluoride-hydrogen fluoride / N,N-dimethyl-formamide; 1-methyl-pyrrolidin-2-one / 144 h / 80 °C View Scheme