1: pyridinium p-toluenesulfonate With trifluoromethanesulfonic acid anhydride; triphenyl-phosphine oxide in dichloromethane 0.333333 h; 2: 2,3,4,5,6-pentafluorophenol With triethylamine in dichloromethane T=0 - 20°C;

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tetrabutyl-ammonium chloride in chloroform T=61°C; 1.25 h;