phosphoric acid; triphenylphosphine in diethyl ether; water 24 h; effect of dilution conditions; various reaction times; other reagent, solvent; Product distribution;

1: hydrogenchloride; triphenylphosphine / water; ethyl acetate / 12 h / 20 °C 2: N,N-dimethyl-formamide / 12 h / 20 °C 3: hydrogenchloride; triphenylphosphine / tetrahydrofuran; water / 20 °C / Inert atmosphere View Scheme

1: hydrogenchloride; triphenylphosphine / diethyl ether / Inert atmosphere 2: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine / dichloromethane / 6 h / 0 °C / Inert atmosphere 3: triphenylphosphine / tetrahydrofuran; water / 24 h / 20 °C / Inert atmosphere 4: silver(l) oxide / dichloromethane / Inert atmosphere View Scheme