Investigations on the Lewis-Acids-Catalysed Electrophilic Aromatic Substitution Reactions of Thionyl Chloride and Selenyl Chloride, the Substituent Effects, and the Reaction Mechanisms
sulfides (Ar2S) from the EAS reactions. Although the reactions of PhH and PhCH3 with SOCl2 in the presence of AlCl3 gave the major Ar2SO and minor Ar2S at ambient temperature, the phenol (PhOH) reaction was shown to give only the reduced sulfide (p-HOC6H4)2S with no sulfoxide (p-HOC6H4)2SO formed. The mixed diaryl sulfoxides ArSOAr’ (Ar, Ar'=C6H5, p-CH3C6H4; C6H5, o-CH3C6H4; and C6H5, p-ClC6H4) were
Iron(III) chloride (FeCl<sub>3</sub>)-catalyzed electrophilic aromatic substitution of chlorobenzene with thionyl chloride (SOCl<sub>2</sub>) and the accompanying auto-redox in sulfur to give diaryl sulfides (Ar<sub>2</sub>S): Comparison to catalysis by aluminum chloride (AlCl<sub>3</sub>)
作者:Xiaoping Sun、David Haas、Chyress Lockhart
DOI:10.1080/10426507.2016.1244206
日期:2017.3.4
GRAPHICAL ABSTRACT ABSTRACT The Lewis acids MCl3 (M = Fe and Al)-catalyzed electrophilic aromatic (ArH) substitution reactions with thionyl chloride (SOCl2) have been shown to give diaryl sulfoxide (Ar2SO) and the reduced diaryl sulfide (Ar2S). Under various selected conditions, the FeCl3-catalyzed reactions of chlorobenzene gave substantially much higher percent yields of Ar2S (Ar = p-ClC6H4) than