26624-20-4

Upstream product

• 1694-20-8 4-nitrostilbene 
• 1694-20-8 trans-4-nitrostilbene 

Downstream Products

• 1694-20-8 trans-4-nitrostilbene 
• 1694-20-8 4-nitrostilbene 
• 78659-31-1 2,6-diamino-4,4-dimethyl-1,3,5-perhydrothiadiazine dihydrobromide 
• 22711-24-6 4-nitrobenzil 
• 100461-36-7 Acetic acid 2-acetoxy-1-(4-nitro-phenyl)-2-phenyl-ethyl ester 
• 1849-25-8 4-phenylethynylphenylamine 
• 39082-26-3 1-((E)-1-Bromo-2-phenyl-vinyl)-4-nitro-benzene 
• 108011-31-0 1-((E)-2-Bromo-2-phenyl-vinyl)-4-nitro-benzene 
• 108011-31-0 (Z)-1-(2-bromo-2-phenylvinyl)-4-nitrobenzene 
• 1942-30-9 4-(phenylethynyl)nitrobenzene 

Relevant academic research and scientific papers

Kinetic study on denomination of vic-dibromides with trivalent phosphorus compounds

Various types of trivalent phosphorus compounds (I) brought about reductive debromination of vic-dibromides (2) to afford olefins. The reaction was accelerated by either electron-releasing substituents on the phosphorus of 1 or electron-with-drawing substituants on the α-carbon of 2. The substituent effects, along with the stereochemistry of the reaction, are consistent with an E1CB-like mechanism for the elimination of the two bromine atoms. That is, 1 initially undergoes nucleophilic attack upon a bromine of 2. At the transition state, a fractional positive charge is developed on the phosphorus of 1 and a fractional negative charge on the carbon of 2. This mechanism suggests the importance of an electronic character of the vic-dibromide in determining the relative ease of bromophilicity, carbophilicity, and basicity of the phosphorus of a trivalent phosphorus compound in a reaction with the dibromide. α 2001 John Wiley & Sons, Inc.

Solvolytic stereoselective debromination of vic-dibromides with HMPA

A simple and efficient procedure for the debromination of vic-dibromides has been reported with hexamethylphosphoric triamide at 155-160°C under a nitrogen atmosphere without the aid of any reagent.

Selectivity Relationships and Substituent-Substituent Interactions in Carbocation-Forming Bromination. The Transition-State Contribution to the ρ Variation

For arylolefin bromination through benzylic carbocations, X-C6H4-C+(R)-CHBr-R', there are 18 reaction constants, ρR, describing ring-substituent effect X, which vary from -1.6 to -5.9 depending on R and R' (H, Me, OMe, or Ar').This r

Elimination Reactions of Stilbene Dibromides. Dehydrobromination by Acetate, Cyanide or Chloride Ions in Dimethylformamide

Rates of dehydrobromination of a series of 4-nitro- and methoxystilbene dibromides by means of acetate, cyanide or chloride ions in dimethylformamide have been measured.A product analysis was performed which indicated a strong preference for anti elimination.Probable transition state structures utilized by each of the three nucleophiles are described.Attack by the base may be at either β-hydrogen (E 2H) or Cα(E2C).The slowest reaction in with chloride ion, which also gives the highest anti/syn elimination product ratio.