Water → 3-(Thiophen-2-yl)propan-1-ol

To a solution of 3-(2-thienyl)propionic acid (5.0 g, 32.0 mmol) in tetrahydrofuran (20 ml) at 0° C. was added 1 M borane tetrahydrofuran complex (33.5 ml, 33.5 mmol) dropwise over 30 minutes. The reaction mixture was then stirred for 18 h whilst warming to room temperature. The temperature was then reduced to 0° C. and water (20 ml) was added to quench the reaction. The solution was then basified with potassium carbonate, the layers separated and the aqueous layer washed with diethyl ether. The combined organic layers were washed with brine, dried and concentrated to yield the title compound (4.71 g) as an oil. DCI MS m/z 142 [M+H]+.