1: With 2-aminopyridine in dichloromethane T=20°C; 0.25 h; Inert atmosphere; 2: With methanesulfonyl chloride in dichloromethane T=0 - 20°C; 5 h; Inert atmosphere;

1: With triethylamine in dichloromethane T=20°C; 0.25 h; Inert atmosphere; 2: With methanesulfonyl chloride in dichloromethane T=0 - 20°C; 5 h; Inert atmosphere;