sodium hydroxide in ethanol; water 1.25 h; Heating;

1: 71 percent / trichloroisocyanuric acid / dimethylformamide / 5.5 h / Ambient temperature 2: 92 percent / NaOH / ethanol; H2O / 1.25 h / Heating View Scheme

1: conc. H2So4 / tetrachloroethene / 4 h / Heating 2: 71 percent / trichloroisocyanuric acid / dimethylformamide / 5.5 h / Ambient temperature 3: 92 percent / NaOH / ethanol; H2O / 1.25 h / Heating View Scheme

diethylphosphoric acid ethyl ester; trichloroisocyanuric acid; boron trifluoride diethyl etherate 1.) 5 deg C, 15 min, 2a.) from 0 deg C to 5 deg C, 1.0 h, 2b.) RT, 4.0 h; Yield given. Multistep reaction. Yields of byproduct given;

1: 83 percent / ZnI2 / CHCl3 / 22 h / Heating 2: 1.) SnCl2, HOAc, 2.) conc. HCl / 1.) 10 min, 2a.) RT, 18 h, 2b.) 100 deg C, 2.5 h View Scheme