383191-52-4

Upstream product

• 583-55-1 1-Bromo-2-iodobenzene 
• 6366-06-9 1-(3,5-dimethylphenyl)acetylene 
• 22445-41-6 3,5-dimethylphenyl iodide 
• 766-46-1 2-bromo-1-ethynylbenzene 

Downstream Products

• 383191-54-6 ({2-[(3,5-dimethylphenyl)ethynyl]phenyl}ethynyl)(trimethyl)silane 
• 383191-41-1 1-[(2-ethynylphenyl)ethynyl]-3,5-dimethylbenzene 

Relevant academic research and scientific papers

Enantioselective Synthesis of 1-Aryl Benzo[5]helicenes Using BINOL-Derived Cationic Phosphonites as Ancillary Ligands

The synthesis of unprecedented BINOL-derived cationic phosphonites is described. Through the use of these phosphanes as ancillary ligands in AuI catalysis, a highly regio- and enantioselective assembly of appropriately designed alkynes into 1-(

New compounds and organic light-emitting diode including the same

The present invention refers to novel compounds and luminescence material including organic light emitting diode relates to search, specifically to novel compounds represented by [formula 1] and including organic light emitting diode to be characterized, including organic electroluminescence light emitting compound for the present invention according to driving voltage [formula 1], current efficiency Eu effect like that excels flow tides. [Formula 1] (by machine translation)

Novel synthesis of 4,5-diarylphenanthrenes via C2-C6 cyclization of benzannulated enyne-allenes

A new synthetic pathway to the 4,5-diarylphenanthrenes 8 having a helical twist in their structures was developed. The synthetic sequence involves condensation of the diketone 5 with 2 equiv of the lithium acetylides derived from the diacetylenes 4 followed by protonation to produce the propargylic alcohols 6. Reduction of 6 with triethylsilane in the presence of trifluoroacetic acid furnished the tetraacetylenic hydrocarbons 7 in nearly quantitative yields. Treatment of 7 with potassium tertbutoxide under refluxing toluene at 110 °C for up to 10 h then furnished the 4,5-diarylphenanthrenes 8. Apparently, the transformation from 7 to 8 involves initial prototropic isomerizations to form the benzannulated enyne-allenes 9. Two subsequent formal intramolecular Diels-Alder reactions via the biradicals 10 and 12 derived from the C2-C6 cyclizations then led to 13, which in turn underwent tautomerizations to give 8. The structure of 8a was established by the X-ray structure analysis, showing that the two phenyl substituents are bent away from each other and the central aromatic system is severely distorted with a helical twist. The existence of a helical twist in 8 imposed by the aryl groups at the 4- and 5-positions was also revealed with a set of AB 1H NMR signals for the diastereotopic methylene hydrogens on the five-membered rings.