It is used in the asymmetric synthesis. Part III. Stereospecific synthesis of (R)-2-hydroxy-2-phenylpropionic acid, and (R)- and (S)-2-cyclohexyl-2-hydroxy-2-phenylacetic acid. Configurational relationship between (R)(-)-2-hydroxy-2-phenylpropionic acid and (S)(+)-2-phenylpropionic acid.