Solvent‐Promoted Catalyst‐Free Nucleophilic Fluoroalkylation of Aldehydes

  • Kazuki Komoda
    Division of Molecular Science Faculty of Science and Technology Gunma University, 1–5-1, Tenjin-cho, Kiryu Gunma 376–8515 Japan
  • Ai Shimokawa
    Division of Molecular Science Faculty of Science and Technology Gunma University, 1–5-1, Tenjin-cho, Kiryu Gunma 376–8515 Japan
  • Hideki Amii
    Division of Molecular Science Faculty of Science and Technology Gunma University, 1–5-1, Tenjin-cho, Kiryu Gunma 376–8515 Japan

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<jats:title>Abstract</jats:title><jats:p>Fluoroalkyl silanes are useful building blocks for nucleophilic introduction of fluoroalkyl groups into organic molecules. In general, fluoroalkyl silanes per se are stable compounds, but they are amenable to reactions as fluoroalkyl anion equivalents in the presence of base such as fluoride ion. Usually, KF acts as a good catalyst for nucleophilic fluoroalkylation of carbonyl compounds. To avoid the use of hygroscopic fluoride salts, we have developed a convenient catalyst‐free method for nucleophilic fluoroalkylation of aldehydes and ketones by the use of fluoroalkyl silanes. Trifluoromethyl(trimethyl)silane (Me<jats:sub>3</jats:sub>Si‐CF<jats:sub>3</jats:sub>), and other fluoroalkyl silanes (Me<jats:sub>3</jats:sub>Si‐R<jats:sub>f</jats:sub>) underwent solvent‐promoted nucleophilic addition to aldehydes smoothly to give fluoroalkylated alcohols in good yields. In the present reactions, the use of polar solvents such as DMSO, DMF or NMP is essential to the formation of 1,2‐adducts.</jats:p>

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