S 2163 (OTTO) Sodium butyrate CAS NO 156-54-7,can be used as a reactant to prepare butanal by reduction using 9-borabicyclo nonane (9-BBN) in THF.It is also converted into butanal borane and pyridinium chlorochromate by the reductive oxidation reaction. Sodium butyrate is reacted with different alcohols to yield esters by Mitsunobu reaction using ionic liquid-based chloroiminium reagent.