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Aldehydes are converted to nitriles in one step in the presence of NaOAc/AcOH (NH4OAc gives the "expected" alkylidene derivative): Synthesis, 510 (1985):

• For a review of the use of nitro-compounds as alkyl anion synthons, including methods for removing the nitro-group from the resulting carbon skeletons, see: Synthesis, 833 (1988).
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For further reactions of aliphatic nitro-compounds, see Nitromethane, A11806.