Synthesis of fluorinated chirons: Stereoselective oxirane formation by reaction of diazomethane on 1-fluoro-3-arylsulfinyl-2-propanone and ring opening by selected nucleophiles
作者:Alberto Arnone、Pierfrancesco Bravo、Massimo Frigerio、Giuliana Salani、Fiorenza Viani、Carmela Zappalà、Giancarlo Cavicchio、Marcello Crucianelli
DOI:10.1016/0040-4020(95)00430-g
日期:1995.7
(R)-1-fluoro-3-[(4-methylphenyl)sulfinyl]-2-propanone (1) reacts with diazomethane affording (S)-2-(fluoromethyl)-2- [(R)-(4-methylphenyl)sulfinyl]methyl}oxirane (2) as the main product. The influence of reaction conditions (solvent, temperature) on the chemo- and stereoselectivity has been studied. Several elaborations of 2, including reactions on the chiral auxiliary and opening of the oxirane ring by carbon, nitrogen oxygen, phosphorus and halogen nucleophiles, are described. Full structural elucidation of the products is provided