Rapid synthesis of homoallylic alcohol from aldehyde with allyltributylstannane under solvent-free conditions.

A catalytic amount (2 mol %) of phosphotungstic acid (PTA) is sufficient to synthesize homoallylic alcohol in excellent yields from aldehyde with allyltributylstannane upon grinding under solvent-free reaction conditions. Easy handling, very short reaction time, solvent-free reaction conditions, and aqueous workup free isolation protocol may make our method very useful for synthetic chemists. [ABSTRACT FROM AUTHOR]