1: N-tert-butylphenylsulfinimidoyl chloride; DBU / CH2Cl2 / 1 h / -78 °C 2: HCl; H2O / diethyl ether; CH2Cl2 / 2 h / 50 °C View Scheme

triethylamine in dichloromethane T=0°C; 1 h;