Preparation and Reactions of 4-Alkoxy-2,2-bis(trifluoromethyl)thietanes and 5-Alkoxy-3,3-bis(trifluoromethyl)dithiolanes
作者:Tomoya Kitazume、Toru Otaka、Ryutaro Takei、Nobuo Ishikawa
DOI:10.1246/bcsj.49.2491
日期:1976.9
4-Alkoxy-2,2-bis(trifluoromethyl)thietanes, 3 (R=Me and Et), were prepared by the reactions of 2,2,4,4-tetrakis(trifluoromethyl)-1,-dithietane with alkyl vinyl ethers in a KF–DMF system. A bimolecular condensation product, bis[4,4-bis(trifluoromethyl)thietan-2-yl]ether, 5, was obtained by the treatment of 3 with concentrated sulfuric acid. On the other hand, when treated with sulfur in DMF in the presence
4-烷氧基-2,2-双(三氟甲基)硫杂环丁烷,3(R=Me 和 Et)是通过 2,2,4,4-四(三氟甲基)-1,-二硫杂环丁烷与烷基乙烯基醚的反应制备的在 KF-DMF 系统中。双分子缩合产物,双[4,4-双(三氟甲基)硫杂环丁烷-2-基]醚,5,通过用浓硫酸处理3获得。另一方面,当在二乙胺存在下用 DMF 中的硫处理时,3 得到 5-烷氧基-3,3-双(三氟甲基)-1,2-二硫戊环,8,产率相当好。研究了这些硫杂环丁烷和 1,2-二硫杂环戊烷的几种反应,包括与丁基锂的反应。