1: With pyridine; monochloromethanesulfonyl chloride T=0°C; Substitution; 2: With zinc diacetate; acetic acid in water T=85°C; Rearrangement; 5 h;

1: With pyridine; monochloromethanesulfonyl chloride T=0°C; Substitution; 2: With zinc diacetate in 1,4-dioxane T=90°C; Elimination; 5 h;