作者:Teruo Umemoto、Sumi Ishihara
DOI:10.1016/s0022-1139(98)00276-0
日期:1998.11
developed for the preparation of useful electrophilic trifluoromethylating agents, S-(trifluoromethyl)dibenzothiophenium tetrafluoroborate (3) and triflate (4) and S-(trifluoromethyl)dibenzothiophenium-3-sulfonate (6). Thus, salts 3 and 4 were produced by the intramolecular cyclization of sulfoxide 1 with fuming sulfuric acid, followed by the counteranion replacement reaction of the intermediate (2) with sodium
开发了用于制备有用的亲电三氟甲基化剂,S-(三氟甲基)二苯并噻吩四氟硼酸酯(3)和三氟甲磺酸酯(4)和S-(三氟甲基)二苯并噻吩-3-磺酸盐(6)的新的有效方法。因此,盐3和4是由亚砜的分子内环化产生1与发烟硫酸,随后中间物(的抗衡阴离子置换反应2)与四氟硼酸盐和三氟甲磺酸酯钠和盐6是直接从生产1用过量的发烟硫酸处理。还介绍了1的有用制备方法。