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  _____      ___               _    _     _  _   
 |__  //    / _ \\    ____    | || | ||  | \| || 
   / //    / //\ \\  |    \\  | || | ||  |  ' || 
  / //__  |  ___  || | [] ||  | \\_/ ||  | .  || 
 /_____|| |_||  |_|| |  __//   \____//   |_|\_|| 
 `-----`  `-`   `-`  |_|`-`     `---`    `-` -`  
                     `-`

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Text this: gem-Difluoromethylation of α- and γ-ketoesters: preparation of gem-difluorinated α-hydroxyesters and γ-butyrolactones