Scheme 3

Synthesis of various allyl trideuteromethyl sulfones. ^a The experimental conditions were as follows: α-methyl styrenes (0.2 mmol), CD₃SSO₃Na (0.4 mmol), Cu(NO₃)₂ (0.02 mmol), hypervalent iodine (0.4 mmol), and solvent (2.0 mL) were subjected to heating at 80 °C for 24 h. ^b Separated yield