3335-35-1Relevant articles and documents
Iron-Catalyzed Halogen Exchange of Trifluoromethyl Arenes**
Dorian, Andreas,Landgreen, Emily J.,Petras, Hayley R.,Shepherd, James J.,Williams, Florence J.
supporting information, p. 10839 - 10843 (2021/06/21)
The facile production of ArCF2X and ArCX3 from ArCF3 using catalytic iron(III)halides is reported, which constitutes the first iron-catalyzed halogen exchange for non-aromatic C?F bonds. Theoretical calculations suggest direct activation of C?F bonds by iron coordination. ArCX3 and ArCF2X products of the reaction are synthetically valuable due to their diversification potential. In particular, chloro- and bromodifluoromethyl arenes (ArCF2Cl, ArCF2Br respectively) provide access to a myriad of difluoromethyl arene derivatives (ArCF2R). To optimize for mono-halogen exchange, a statistical method called Design of Experiments was used. Optimized parameters were successfully applied to electron rich and electron deficient aromatic substrates, and to the late stage diversification of flufenoxuron, a commercial insecticide. These methods are highly practical, being run at convenient temperatures and using inexpensive common reagents.
Chlorination and alkylation of toluene with carbon tetrachloride
Smirnov,Nevskaya,Golubeva
, p. 20 - 25 (2007/10/03)
It was shown that benzyl chloride can be synthesized from toluene and carbon tetrachloride with a high selectivity. The optimum conditions of side-chain chlorination and benzene-ring alkylation in the CCl4-toluene system were determined.
Substituted Benzotrichloride Synthesis by Phase Transfer-Catalyzed Chlorination
Chupp, J. P.,Grabiak, R. C.,Leschinsky, K. L.,Neumann, T. L.
, p. 224 - 226 (2007/10/02)
A new method for converting benzyl and benzal chlorides to benzotrichlorides is reported.In contrast to prior art, the process involves contacting the substrates with strong alkali in a two-phase system containing phase transfer catalyst using organic soluble perchloralkanes acting upon base-generated carbanions.The method is particularly useful for preparing benzotrichlorides substituted by either alkyl or nitro groups.