1: 2,2,2-trifluoroethanol With potassium hydroxide; Aliquatreg; 336 in dichloromethane T=30°C; 0.25 h; Inert atmosphere; 2: methyl 6-{[(methylsulfonyl)oxy]methyl}pyridine-3-carboxylate in dichloromethane 0.25 h;