1: 63 percent / bis-dimethylglyoximato(pyridine)cobalt(III), sodium borohydride, sodium hydroxide, pyridine / ethanol; diethyl ether / 3 h 2: 60 percent / potassium hydrogen sulfate / dimethylformamide / Heating View Scheme

1: 63 percent / bis-dimethylglyoximato(pyridine)cobalt(III), sodium borohydride, sodium hydroxide, pyridine / ethanol; diethyl ether / 3 h 2: 1.) NBS, methanol, 2.) p-toluenesulfonic acid / 2.) benzene View Scheme