in dichloromethane; triethylamine; acetonitrile mixt. of the Fe complex in CH3CN and Na benzoate stirred for 0.5 h; mixt. of BICOH in CH3CN/CH2Cl2 and Et3N stirred for 1 h and added to first mixt.; reaction mixt. stirred for 1 h; filtration, solvents removed in vac.; solid washed with hexane/CHCl3; resulting oil dried overnight under vac.; recrystn. from CH3CN; elem. anal.;

in dichloromethane; triethylamine; acetonitrile mixt. of the Fe complex in CH3CN and Na benzoate stirred for 0.5 h; mixt. of BICOH in CH3CN/CH2Cl2 and Et3N stirred for 1 h and added to first mixt.; reaction mixt. stirred for 1 h; filtration, solvents removed in vac.; solid washed with hexane/CHCl3; resulting oil dried overnight under vac.; recrystn. from CH3CN; elem. anal.;

in dichloromethane; triethylamine; acetonitrile mixt. of the Fe complex in CH3CN and Na benzoate stirred for 0.5 h; mixt. of BICOH in CH3CN/CH2Cl2 and Et3N stirred for 1 h and added to first mixt.; reaction mixt. stirred for 1 h; filtration, solvents removed in vac.; solid washed with hexane/CHCl3; resulting oil dried overnight under vac.; recrystn. from CH3CN; elem. anal.;

n-butyllithium in tetrahydrofuran T=-78 - 20°C;

n-butyllithium 1.) diethyl ether; Yield given. Multistep reaction;