1: γ-cyclodextrin With di(n-butyl)tin oxide in N,N-dimethyl-formamide T=100°C; 2 h; Inert atmosphere; 2: p-toluenesulfonyl chloride With triethylamine in N,N-dimethyl-formamide T=0 - 20°C; Inert atmosphere;

in pyridine 1 h;