Multi-step reaction with 9 steps
1: LAH / diethyl ether / Heating
2: 89 percent / Br2, PPh3 / acetonitrile / 1 h / Ambient temperature
3: 67 percent / H2O; ethanol / 15 h / Heating
4: 66 percent / NaOH, H2O / 2.5 h / Heating
5: 97 percent / (COCl)2, DMF / CH2Cl2 / 1.) 0 deg C, 2.5 h, 2.) room temperature, 2 h
6: 1.) nBuLi / 1.) hexane, THF, -78 deg C, 30 min, 2.) THF, -78 deg C, 4 h
7: 1.) KHMDS, 2.) 2,4,6-triisopropylbenzenesulfonyl azide / 1.) THF, toluene, -78 deg C, 30 min, 2.) THF, -78 deg C, 12-15 min
8: SnCl2 / dioxane; H2O / 4.5 h / Ambient temperature
9: NaHCO3 / Ambient temperature
With
sodium hydroxide; lithium aluminium tetrahydride; n-butyllithium; oxalyl dichloride; 2,4,6-Triisopropylbenzenesulfonyl azide; water; bromine; potassium hexamethylsilazane; sodium hydrogencarbonate; N,N-dimethyl-formamide; triphenylphosphine; tin(ll) chloride;
In
1,4-dioxane; diethyl ether; ethanol; dichloromethane; water; acetonitrile;
DOI:10.1016/S0040-4020(97)00657-1