In the case of the addition of ketones to styrene, best results were obtained by using DMSO as solvent since it was observed that NMP reacts with styrene. 3a The reaction temperature is crucial for limiting the formation of double addition products of styrene, and by conducting the reaction between 38 and 41 °C, a smooth addition reaction occurs. In the case of 2-tetralone (2c), cyclohexanone (2b), and camphor (2d), only traces of double addition products were observed and very ...