1: 2-aminoethyl diphenylborinate; N-ethyl-N,N-diisopropylamine / acetonitrile / 22 h / 20 °C 2: lithium aluminium tetrahydride / tetrahydrofuran; diethyl ether / 1 h / 0 °C / |Reflux 3: ReOCl3(SMe2)(OPPh3) / benzene / 72 h / 0 °C 4: tetrabutyl ammonium fluoride / tetrahydrofuran 5: ReOCl3(SMe2)(OPPh3) / benzene / 60 h / 0 °C 6: tetrabutyl ammonium fluoride / tetrahydrofuran / 5 h / 40 °C 7: LiDBB / tetrahydrofuran / 0.25 h / -20 °C 8: 1H-imidazole / N,N-dimethyl-formamide / 0.75 h / 20 °C 9: triphenylphosphine hydrobromide / chloroform / 3.17 h / 20 °C / |Molecular sieve 10: ammonium fluoride-hydrogen fluoride / N,N-dimethyl-formamide; 1-methyl-pyrrolidin-2-one / 4 h / 70 °C View Scheme