1: bromine / CH2Cl2 / 0.25 h / 0 °C 2: 65 percent / triethylamine / tetraethylammonium bromide / CH2Cl2; dimethylformamide / 48 h / Ambient temperature 3: 60 percent / 1.) potassium tert-butoxyde, 2.) mercury(II) oxide, mercury(II) chloride / dimethylsulfoxide; acetone; H2O / 1.) methyl sulfoxide, potassium tert-butoxide, 100 deg C., 2h, 2.) mercury(II) oxide, mercury(II) chloride, aceton-water, 30 min., room temperature 4: 70 percent / molecular sieve 4 Angstroem, mercury(II) cyanide / benzene; nitromethane / 40 °C 5: hydrogen / 10percent Pd/C / methanol / 36 h / Ambient temperature 6: sodium methoxide / methanol; H2O View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: NaOMe / methanol<br />2: 6 g / NaH / dimethylformamide<br /> <br /> &nbsp;