Darstellung und Eigenschaften Trifluormethyl- und Trifluormethylchalkogenyl-substituierter Adamantane
作者:Roland Feldhoff、Alois Haas、Max Lieb
DOI:10.1016/0022-1139(93)02968-k
日期:1994.6
Trifluoromethyl- and trifluoromethylchalcogenyl-substituted adamantanes have been synthesized and modified chemically. Thus, 1-amino-3-trifluoromethyl-adamantane, for example, was prepared and converted into various N-halogeno derivatives by fluorination with elemental fluorine or oxidation with hypochlorites. The N,N-difluoro N-chloro and N,N-dichloro molecules were generated in a similar manner.
Structure–Reactivity Relationship of Trifluoromethanesulfenates: Discovery of an Electrophilic Trifluoromethylthiolating Reagent
作者:Xinxin Shao、Chunfa Xu、Long Lu、Qilong Shen
DOI:10.1021/jo502645m
日期:2015.3.20
A family of electrophilic trifluoromethanesulfenates was prepared. Structure–reactivity relationship studies showed that the substituted groups on the aryl ring of the trifluoromethylthiolating reagent did not have an obvious influence on their reactivities. A simplified electrophilic trifluoromethylthiolating reagent 1c was then identified that can react with a wide range of nucleophiles such as Grignard
A practical and efficient method for the direct trifluoromethylthiolation of unactivated C(sp3)H bonds by AgSCF3/K2S2O8 under mild conditions is described. The reaction has a good functional‐group tolerance and good selectivity. Initial mechanistic investigations indicate that the reaction may involve a radical process in which K2S2O8 plays key roles in both the activation of the C(sp3)H bond and
decarboxylative di‐ and trifluoromethylthiolation of alkyl carboxylic acids promoted by visible light. This approach enables the synthesis of biologically relevant alkyl SCF2H and SCF3 compounds from cheap and abundant carboxylic acids. The method is operationallysimple, using irradiation from household light sources, and its mild reaction conditions make it tolerant of a range of functional groups
A silver‐catalyzed decarboxylative trifluoromethylthiolation of secondary and tertiary carboxylic acids under mild conditions tolerates a wide range of functional groups. The reaction was dramatically accelerated by its performance in an aqueous emulsion, which was formed by the addition of sodium dodecyl sulfate to water. It was proposed that the radical, which was generated from the silver‐catalyzed