Enantioselective radical-mediated reduction of α-iodolactone using tributyltin hydride in the presence of a chiral amine and a Lewis acid

Abstract
Enantioselective radical-mediated reduction of α-methoxymethyl-α-iododihydrocoumarin 1 using tributyltin hydride is realized in up to 62% enantiomeric excess (e.e.)(88% chemical yield) by combination of chiral diamine 2 and magnesium iodide.