Multi-step reaction with 5 steps
1: 97 percent / sodium p-toluenesulfinate, sodium iodide / dimethylformamide / 2 h / 80 °C
2: 1.) lithium diisopropylamide; 2.) hexamethylphosphoramide / 1.) tetrahydrofuran, -78 deg C, 1 h; 2.) tetrahydrofuran, -78 deg C, 2 h
3: 1.) 60percent sodium hydride; 2.) 10percent hydrochloric acid / 1.) benzene, r.t., 30 min; 2.) 8 h, r.t., water
4: 1.) methanesulfonyl chloride / 1.) pyridine, r.t., 1 h; 2.) 3 h, r.t.
5: 23 percent / 1,2-dichloro-benzene / 4 h / 180 °C
With
hydrogenchloride; N,N,N,N,N,N-hexamethylphosphoric triamide; sodium hydride; methanesulfonyl chloride; sodium 4-methylbenzenesulfinate; sodium iodide; lithium diisopropyl amide;
In
N,N-dimethyl-formamide; 1,2-dichloro-benzene;
DOI:10.1016/S0040-4020(01)96631-1