Power-variable electrophilic trifluoromethylating agents. S-, Se-, and Te-(trifluoromethyl)dibenzothio-, -seleno-, and -tellurophenium salt system
作者:Teruo Umemoto、Sumi Ishihara
DOI:10.1021/ja00059a009
日期:1993.3
Te-trifluoromethylated dibenzoheterocyclic onium salts, their derivatives, and related salts were synthesized by the direct fluorination of a mixture of 2-[(trifluoromethyl)thio- or seleno]biphenyls and triflic acid (TfOH) or HBF 4 etherate, by treatment of the corresponding sulfoxides and selenoxides with Tf 2 O by a new type of tellurium activation of 2-[(trifluoromethyl)telluro]biphenyls with Tf 2 O and (CH
S-、Se-和 Te-三氟甲基化二苯并杂环鎓盐、它们的衍生物和相关盐是通过 2-[(三氟甲基)硫代或硒代]联苯和三氟甲磺酸 (TfOH) 或 HBF 的混合物的直接氟化合成的4 醚化物,通过使用 Tf 2 O 和 (CH 3 ) 2 SO 对 2-[(三氟甲基) 碲] 联苯进行新型碲活化,或通过鎓的衍生,用 Tf 2 O 处理相应的亚砜和硒氧化物得到的盐。反应性检查表明,与非杂环盐相比,三氟甲基杂环盐具有很强的反应性,并表明该杂环盐体系可作为广泛适用的三氟甲基化剂的来源
Perfluoroalkyl-containing compound
申请人:Sagami Chemical Research Center
公开号:US05066795A1
公开(公告)日:1991-11-19
A (perfluoroalkyl)dibenzonium salt represented by the following general formula ##STR1## wherein R.sub.f represents a perfluoroalkyl group having 1 to 10 carbon atoms, A represents a sulfur of selenium atom, R.sup.1 and R.sup.2, independently from each other, represent a hydrogen atom or a nitro group, X.sup..crclbar. represents a conjugated base of Bronsted acid, and n is 0 or 1. The said compound is useful as a reagent for introducing a perfluoroalkyl group.