7249-83-4

Basic information

• Product Name: 2-(diphenylmethyl)-1,4-dimethylbenzene
• CAS NO: 7249-83-4
• Molecular Formula: C₂₁H₂₀
• Molecular Weight: 272.3835
• Mol File: 7249-83-4.mol
• Article Data: 12

Chemical Properties

• Boiling Point: 384.7°C at 760 mmHg
• Flash Point: 182.1°C
• Density: 1.026g/cm³
• Vapor Pressure: 8.9E-06mmHg at 25°C
• Refractive Index: 1.59
• CAS DataBase Reference: 2-(diphenylmethyl)-1,4-dimethylbenzene(CAS DataBase Reference)
• NIST Chemistry Reference: 2-(diphenylmethyl)-1,4-dimethylbenzene(7249-83-4)
• EPA Substance Registry System: 2-(diphenylmethyl)-1,4-dimethylbenzene(7249-83-4)

Safety Data

• Hazardous Substances Data: 7249-83-4(Hazardous Substances Data)

Usage

Appearance

White to off-white crystalline solid

Odor

Faint, aromatic

Usage

Intermediate in production of fragrances, aromatic compounds, and pharmaceuticals

Applications

Automotive, electronics, cosmetics industries

Role in synthesis

Key component in synthesis of complex molecules with multiple aromatic rings

Additional uses

Stabilizer in polymers, additive in lubricants and oils

Upstream product

• 106-42-3 para-xylene 
• 90-99-3 diphenylchloromethane 
• 776-74-9 Bromodiphenylmethane 
• 91-01-0 1,1-Diphenylmethanol 
• 574-42-5 benzhydryl ether 
• 19672-37-8 3-benzhydryl-pentane-2,4-dione 
• 42100-74-3 ((octyloxy)methylene)dibenzene 
• 4044-60-4 2,5-dimethylbenzophenone 
• 855869-12-4 (2,5-Dimethyl-phenyl)-diphenyl-methanol 

Downstream Products

• 500698-13-5 5-methyl-3,3-diphenyl-phthalide 

Relevant articles and documents

Two-component boronic acid catalysis for increased reactivity in challenging Friedel-Crafts alkylations with deactivated benzylic alcohols

A general and efficient boronic acid catalyzed Friedel-Crafts alkylation of arenes with benzylic alcohols was previously developed for the construction of unsymmetrical diarylmethane products (X. Mo, J. Yakiwchuk, J. Dansereau, J. A. McCubbin and D. G. Hall, J. Am. Chem. Soc., 2015, 137, 9694). Highly electron-deficient benzylic alcohols, however, were ineffective coupling partners due to the increased difficulty of C-O bond ionization. Herein, we report the use of perfluoropinacol as an effective co-catalyst to improve the reactivity of a boronic acid catalyst in the Friedel-Crafts benzylations of electronically deactivated primary and secondary benzylic alcohols. According to spectroscopic studies, it is believed that perfluoropinacol condenses with the arylboronic acid catalyst to form a highly electrophilic and Lewis acidic boronic ester. This in situ formed species enables a more facile ionization of the benzylic alcohols likely through a mode of activation promoted by a Lewis acid assisted hydronium Br?nsted acid generated from the interactions of the transient boronic ester with hexafluoroisopropanol solvent and water.

SO3H-functionalized organic-inorganic ionic liquids based on polyoxometalates characterization and their application in C-C coupling reaction

Different ionic liquids (ILs) with SO3H as functional group were achieved by combining SO3H-functionalized organic cations and polyoxometalates (POM). The obtained salts were characterized and their catalytic activities investigated

Benzylation of arenes with benzyl halides synergistically promoted by in situ generated superacid boron trifluoride monohydrate and tetrahaloboric acid

To examine the assembly methodology of diarylmethanes, a benzylation of (hetero)arenes with benzyl halides has been developed and various diarylmethanes were furnished with yields of up to 98% and regioselectivities of up to >99%. The complexation of the by-product halogen hydride with BF3·OEt2 generated the Bronsted acid BF3·HX (HBF3X, X=Cl or Br) in situ to synergistically promote the benzylation.