Polyhaloaromatics. Part I. 4,5,6,7-tetrachloro-1,1,3,3-tetrafluoro-1,3,-dihydroisobenzofuran and related compounds from the reaction of tetrachlorophthalic anhydride with sulphur tetrafluoride
作者:Wojciech Dmowski、Jerzy Wielgat
DOI:10.1016/s0022-1139(00)81978-8
日期:1987.12
Fluorination of tetrachlorophthalic anhydride or tetrachlorophthalic acid hemihydrate with an excess of sulphur tetrafluoride provides an efficient one-step synthesis of 4,5,6,7-tetrachloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran . 3,4,5,6-Tetrachloro-2-(trifluoromethyl)benzoyl fluoride is formed as a side product. A method for the quantitative removal of fluoride and its isolation as 3,4,5,6
用过量的四氟化硫氟化四氯邻苯二甲酸酐或四氯邻苯二甲酸半水合物提供了4,5,6,7-四氯-1,1,3,3-四氟-1,3-二氢异苯并呋喃的有效一步合成。形成3,4,5,6-四氯-2-(三氟甲基)苯甲酰氟作为副产物。已经开发出一种定量除去氟化物并将其分离为3,4,5,6-四氯-2-(三氟甲基)苯甲酸的方法。降低的SF 4与比例形成4,5,6,7-四氯-3,3-二氟-3-氢异苯并呋喃酮的混合物。