Formation of 1,1,3,3-tetrafluoro-1,3-dihydroisobenzofurans in reactions of phthalic acids with sulphur tetrafluoride. Evaluation of the steric and electronic effects of the substituents
作者:Wojciech Dmowski
DOI:10.1016/s0022-1139(00)80485-6
日期:1993.11
acid and 3,6-dimethylphthalic anhydride have been reacted with sulphur tetrafluoride to give mixtures of the corresponding bis(trifluoromethyl)benzenes and 1,1,3,3-tetrafluoro-1,3-dihydroisobenzofurans in a 5:1 and 1:3.6 ratio, respectively. These and earlier results on the reactions of sulphur tetrafluoride with substituted and unsubstituted phthalic and pyromellitic acids are compared and structural
使4,5-二硝基邻苯二甲酸和3,6-二甲基邻苯二甲酸酐与四氟化硫反应,以5的比例生成相应的双(三氟甲基)苯与1,1,3,3-四氟-1,3-二氢异苯并呋喃的混合物:比例分别为1和1:3.6。比较了四氟化硫与取代和未取代的邻苯二甲酸和均苯四酸反应的这些和较早的结果,并讨论了影响循环和非环状产物竞争形成的酸中的结构因素。还研究了1,1,3,3-四氟-1,3-二氢异苯并呋喃对无水氟化氢裂解的稳定性。