23349-12-4

Upstream product

• 2642-81-1 1,1-bis(p-chlorophenyl)ethene 
• 90-98-2 4,4'-Dichlorobenzophenone 

Downstream Products

• 19618-36-1 3,3-bis(4-chlorophenyl)acrylic acid 
• 34132-11-1 2,2-bis-(p-chlorophenyl)-1-nitroethylene 
• 1820-42-4 bis(4-chlorophenyl)acetylene 
• 18164-50-6 2,2-bis(4-chlorophenyl)acetaldehyde 
• 58811-79-3 2,2-bis(p-chlorophenyl)vinyl-N-acetamide 
• 75057-04-4 C₃₀H₂₄Cl₂O₂ 
• 102241-15-6 4,4'-(2-tosylethene-1,1-diyl)bis(chlorobenzene) 

Relevant academic research and scientific papers

Bromination of 1,1-diarylethylenes with bromoethane

Aliphatic bromide was used as a halogenation reagent in the presence of DMSO, resulting in 2,2-diarylvinyl bromides from the corresponding 1,1-diarylethylenes. This protocol not only provides a convenient and straightforward strategy for the rapid construction of various 2,2-diarylvinyl bromides without bromine and extra oxidants, but also can improve the atom economy of Kornblum oxidative reaction.

Halogenation of 1,1-diarylethylenes by N-halosuccinimides

An efficient method for the preparation of 2,2-diarylvinyl halides from the corresponding 1,1-diarylethylenes has been developed. N-Halosuccinimides (N-bromosuccinimide or N-chlorosuccinimide) were used as the halogenation reagents. The practicability of this method is highlighted by its simple operation, broad substrate scope and capability for large-scale reaction.

Dehydrobromination of 1,1-diaryl-1,2-dibromoalkanes catalyzed by iron and iron bromides. An ion-pair-mediated reaction?

The participation of ion-paired Lewis acid/Lewis base in the dehydrohalogenations of 1,2-dibromo-1,1-diarylalkanes catalyzed by Fe0 and by Fe(II) and Fe(III) bromides was investigated.The reactivities of the catalyst employed were correlated with their chemical hardness.The influence of para substituents on the phenyl rins of the substrates and the results obtained in Lewis-acid-catalyzed and thermal dehydrobromination of the same compounds were compared.The experimental results could not be explained in terms of a Lewis-acid-catalyzed dehydrobromination.Key words: dehydrohalogenation, bromoalkanes, Lewis acid catalysts, ion-pair mechanism.