An efficientsynthesis of 3-[2-(arylamino)thiazol-4-yl]coumarins in excellent yields are described. Reaction of 3-(2-bromoacetyl)coumarin with potassium thiocyanate and arylamines, in alcohol resulted in the formation of title compounds in onepot. The same compounds were also prepared by grinding these coumarins and arylthiourea together.