Synthesis of homoallylic (but-3-enylic) alcohols from aldehydes with allylic chlorides, tin(II) chloride and potassium iodide in water

Homoallylic (but-3-enylic) alcohols have been prepared in good yields by reductive allylation of aldehydes in water with various allylic chlorides in the presence of tin(II) chloride and potassium iodide. The Barbier type reaction with prop-2-ynyl chloride is also achieved under the same conditions.