Bulletin of the Chemical Society of Japan p. 1427 - 1433 (1994)
Update date:2022-08-04
Topics:
Saji
Tamoto
Tanaka
Miyauchi
Fujimoto
Ohashi
The stereoselective synthesis of antifungal agent threo-2-(2,4-difluorophenyl)-3-methylsulfonyl-1-(1H-1,2,4-triazol-1-yl )-2-butanol (SM-8668) is described. The key step is the selective synthesis of intermediate threo-2-(2,4-difluorophenyl)-2-(1-substituted ethyl)oxirane. threo-2-(2,4-difluorophenyl)-2-(1-methylthioethyl)oxirane was synthesized threo-selectively by the reaction of 1-(2,4-difluorophenyl)-2-methylthio-1-propanone with dimethyloxosulfonium methylide in a heterogeneous media consisting of a hydrophobic solvent and aqueous alkaline solution.
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