Gallium-Mediated Highly Regioselective Reaction of Allyl-Type Bromide and Propargyl-Type Bromide With Aldehyde

Abstract
In the presence of potassium iodide and lithium chloride, the one-pot reaction of gallium powder, allyl-type bromide and aldehyde shows very high selectivity favoring a-adducts. Under the same condition, the reaction of propargylic bromide with aldehyde exhibit high acetylenic selectivity.