Multi-step reaction with 6 steps
1: 88 percent / diethylaminosulfur trifluoride / toluene; 1,2-dichloro-ethane / -40 deg C, 3h, then room temp., 1h
2: 19 percent / AgOSO2CF3, SnCl2 / CCl4 / molecular sieves; -20 deg, 30 min, then 0 deg C, 30 min, then room temp., 2h
3: 78 percent / N-bromosuccinimide / acetonitrile; H2O / 0.5 h / 60 °C
4: 4.23 g / t-BuOK / 2-methyl-propan-2-ol; tetrahydrofuran / 0 deg C, 2h, then room temp., 1h
5: DBU / toluene / 0 deg C, 2h, then room temp., 30 min.
6: diethylaminosulfur trifluoride / toluene; 1,2-dichloro-ethane / -40 deg C, 30 min, then 0 deg C, 30 min
With
N-Bromosuccinimide; diethylamino-sulfur trifluoride; potassium tert-butylate; silver trifluoromethanesulfonate; 1,8-diazabicyclo[5.4.0]undec-7-ene; tin(ll) chloride;
In
tetrahydrofuran; tetrachloromethane; water; 1,2-dichloro-ethane; toluene; acetonitrile; tert-butyl alcohol;
DOI:10.1016/S0040-4020(01)97586-6