1: With ozone in methanol T=-42°C; 2: With dimethylsulfide in methanol T=-42 - 20°C; 3 h;

oxygen; lithium chloride; copper dichloride; {Pd2(MeCN)2(PHT)[(S)-Tol-BINAP]}(BF4)2 in tetrahydrofuran; water T=25°C; P=760 Torr; Title compound not separated from byproducts;

1: 87 percent / K2CO3 / acetone / 2 h / Heating 2: O2; LiCl; CuCl2 / {Pd2(MeCN)2(PHT)[(S)-Tol-BINAP]}(BF4)2 / tetrahydrofuran; H2O / 25 °C / 760 Torr View Scheme