170880-64-5

Upstream product

• 623-27-8 terephthalaldehyde, 
• 52988-36-0 triphenyl(3,5-dimethylbenzyl)phosphonium bromide 
• 1448425-34-0 1,2-dibromo-1-(4-formylphenyl)-2-(3',5'-dimethylphenyl)ethane 
• 1448425-35-1 (E)-1-(1,2-dibromo-2-(3,5-dimethylphenyl))ethyl 
• 108-67-8 1,3,5-trimethyl-benzene 
• 27129-86-8 1-bromomethyl-3,5-dimethylbenzene 

Downstream Products

• 1448425-34-0 1,2-dibromo-1-(4-formylphenyl)-2-(3',5'-dimethylphenyl)ethane 

Relevant academic research and scientific papers

Selective oxidation of an electronically unsymmetrical distyrylbenzene at either of two sites

A p-distyrylbenzene bearing electron-withdrawing groups on one terminal ring and electron-supplying groups on the other was synthesized and one ring was found to be significantly more electron rich than the other. Electrochemical oxidative cleavage was sh

Synthesis and x-ray analysis of new [5]helicenes - HMO calculations on the photocyclization of the stilbene precursors

The syntheses of the new pentahelicenes 5, 11, 17, 21, and 28 with various substituents are described. In the case of 2,13-dicyano-[5]helicene (11) optical resolution was achieved by HPLC using a column packed with γ- cyclodextrin. However, the enantiomers racemized within a few hours. On the other hand, the enantiomers of 28 turned out to be stable after separation on triacetylcellulose using MPLC. The crystal structures of 11, 17, and 21 were solved and indicated the typical distortions which are expected for helicenes. The model of the sum of free valence numbers was applied in order to rationalize the reactivity pattern of the photochemical phenanthrene cyclization.