1: With (S)-(-)-α,α-diphenyl-2-pyrrolidinemethanol in tetrahydrofuran T=-5°C; 16 h; 2: With oxygen in dichloromethane T=-78°C; 0.5 h; Title compound not separated from byproducts;

1: With (S)-(-)-α,α-diphenyl-2-pyrrolidinemethanol in tetrahydrofuran T=-5°C; 16 h; 2: With oxygen in dichloromethane T=-78°C; 0.5 h; Title compound not separated from byproducts;