1,1-Dichloroethane → 3-[(S)-[1-(2-methylphenyl)imidazol-2-yl]sulfinyl]propan-1-ol

Participants

Reaction Steps

To 3 l of dichloroethane were added 123 g of 3-[1-(2-methylphenyl)-2-imidazolylthio]propanol, 414 g of L-(+)-diethyl tartarate and 120 g of a powder of Molecular Sieve 4A. The mixture was stirred at room temperature for 2 days. Thereto was added 142 g of titanium tetraisopropoxide. The mixture was stirred at room temperature for 30 minutes. Thereto was added 91 g of cumene hydroperoxide. The mixture was stirred at 5° C. for 24 hours. The reaction mixture per se was purified by a silica gel column chromatography (eluant: dichloromethane/methanol=50/1). Recrystallization from methyl ethyl ketone was repeated to obtain 50 g of (S)-(+)-3-[1-(2-methylphenyl)2-imidazolylsulfinyl]propanol.

Provenance & Evidence