Multi-step reaction with 7 steps
1: CH2Cl2 / Ambient temperature
2: 530 g / NaBH4 / methanol / 8 h / Ambient temperature
3: 60 percent / NaHCO3 / benzene / 1.) room temp., 2 h, 2.) reflux, 16 h
4: 1.) aq. KOH, 2.) NaHCO3 / 1.) MeOH, reflux, 18 h, 2.) MeOH, H2O, 0 deg C, 1 h, then room temp., 4 h
5: 93 percent / Br2, Ph3P, imidazole / CH2Cl2 / 18 h / Ambient temperature
6: 1.) diisopropylamin, BuLi, LiCl / 1.) THF, hexane, 0 deg C, 30 min, 2.) THF, hexane, 0 deg C, 1 h
7: dioxane / 1.) 0 deg C, 30 min, 2.) room temp., 1 h
With
1H-imidazole; potassium hydroxide; sodium tetrahydroborate; n-butyllithium; bromine; sodium hydrogencarbonate; diisopropylamine; triphenylphosphine; lithium chloride;
In
1,4-dioxane; methanol; dichloromethane; benzene;
DOI:10.1016/S0040-4020(98)00346-9