Palladium-catalysed ring opening of oxazines: a means of stereospecific isotopic labelling at benzylic carbon
Abstract
The synthesis is reported of 3-(4-methoxy-phenyl)propionic acid (11) asymmetrically labelled at C-3 with deuterium by a procedure which involves as key step the palladium-catalysed ring opening of the optically active oxazine (6).