| 摘要 |
<p>1. A process for the preparation of 3-iodotetrafluoropropionic acid characterised by reacting iodine, tetrafluoroethylene and ethylene in a molar ratio of 1:(1.2 to 2):(1 to 1.2) at a temperature of 170 to 200 degrees C in a one-pot reaction, and isolating from the resulting reaction product the compound 1,4-diiodo-1,1,2,2- tetrafluorobutane, reacting this butane compound with a base in order to eliminate hydrogen iodide, and isolating the compound 1-iodo-1,1,2,2,-tetrafluoro-3-butene from this reaction product, reacting this butene compound with an oxidising agent in order to convert it into the corresponding propionic acid, and isolating 3-iodo-2,2,3,3-tetrafluoropropionic acid from this reaction product.</p> |
