1: 25 percent / potassium tert-butoxide / dimethylsulfoxide / 4 h / Ambient temperature 2: 42 percent / diethyl ether / 1 h / Ambient temperature 3: ethanolamine-hydrochloric acid buffer / H2O / 15 °C / ΔH(excit.), ΔS(excit.), ΔG(excit.), deuterium isotope effect 1.3 View Scheme

hydrogenchloride 0.0333333 h; microwave irradiation;

1: 94 percent / aq. HCl / 0.03 h / microwave irradiation 2: 93 percent / poly-4-vinylpyridine / dimethylformamide / 0.05 h / microwave irradiation View Scheme

dibenzo-18-crown-6; tetrabutylammomium bromide; potassium carbonate in dichloromethane 45 min, RT; 3.00 h;

N-bromosuccinmide; polymer supported triphenyl phosphine; triethylamine T=20°C; 1.5 h;

in ethylene glycol dimethyl ether 6 h; Heating;

1: 67 percent / potassium hydroxide / ethanol / 4 h / Heating 2: 23 percent / sulfuric acid / 5 h / Ambient temperature View Scheme

sulfuric acid 5 h; Ambient temperature;