Table 2. Aerobic oxidative oxosulfonation of different α-substituted phenylethylenes with DMSO a .
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aReaction conditions: 1 (0.25 mmol), 2 (1 mL), PdCl2 (10 mol%), Cu(OPiv)2 (20 mol%), d-(–)-fructose (40 mol%) and 1 atm CO/O2 (1 : 1) at 80 °C for 15 h. Isolated yields.