26957-36-8

Upstream product

• 90-96-0 bis(p-methoxyphenyl)methanone 
• 920-39-8 isopropylmagnesium bromide 
• 40811-05-0 1-(4-methoxyphenyl)-2-methylprop-1-enyl bromide 
• 100-66-3 methoxybenzene 
• 79-30-1 isobutyryl chloride 
• 917481-50-6 1-(isopropylsulfonyl)-3,5-bis(trifluoromethyl)benzene 
• 31067-02-4 1,1-Bis(p-methoxyphenyl)ethan-1-ol 
• 4356-69-8 1,1-bis-(4-methoxyphenyl)ethylene 
• 7446-70-0 aluminium trichloride 
• 13139-86-1 4-methoxyphenyl magnesium bromide 
• 97-62-1 Ethyl isobutyrate 

Downstream Products

• 90-96-0 bis(p-methoxyphenyl)methanone 
• 84726-78-3 2-nitro-2-methyl-1-methoxy-1,1-(4,4-dimethoxydiphenyl)propane 
• 84726-70-5 C₁₇H₁₈NO₄⁽¹⁺⁾ 
• 20143-63-9 trinitromethanide 
• 94580-80-0 2-Methyl-1,1-bis-(4-acetoxy-phenyl)-propen-⁽¹⁾ 
• 4741-75-7 1,1-bis(4-methoxyphenyl)-2-methylpropane 

Relevant academic research and scientific papers

Characterization of persistent intermediates generated upon inclusion of 1,1-diarylethylenes within CaY zeolite: Spectroscopy and product studies

Inclusion of 1,1-diarylethylenes within activated CaY results in the formation of colored samples that are stable for prolonged periods. For example, diphenylethylene generates a green color within CaY. Two reactive intermediates have been shown to be res

3,5-Bis(trifluoromethyl)phenyl sulfones in the Julia-Kocienski olefination - Application to the synthesis of tri- and tetrasubstituted olefins

3,5-Bis(trifluoromethyl)phenyl (BTFP) sulfones 8a-d are successfully employed in the modified Julia olefination reaction with carbonyl compounds employing phosphazene base P4-tBu at room temp. in THF, affording tri- and tetrasubstituted olefins in good yi

Activation conditions play a key role in the activity of zeolite CaY: NMR and product studies of Bronsted acidity

CaY, activated under different conditions, was characterized with 1H, 31P, and 1H/27A] double resonance MAS NMR. The 1H MAS NMR spectra of CaY, calcined in an oven at 500 °C, shows resonances from H2O (bound to Ca2+ and the zeolite framework), CaOH+, aluminum hydroxides, silanols, and Bronsted acid sites. No evidence for Lewis acidity is observed on adsorption of trimethylphosphine, and an estimate of ≈16 Bronsted acid sites per unit cell is obtained for this sample. CaY activated in an oven at higher temperatures contains less water, but all the other species are still present. In contrast, CaY activated by slow ramping of the temperature under vacuum to 500 or 600 °C shows a much lower concentration of Bronsted acid sites (1/unit cell). Again, no evidence for Lewis acidity was observed. These NMR results have been utilized to understand the very different product distributions that are observed for reactions of 1,1- and 1,2-diarylethylenes in zeolite CaY activated in an oven (in air) and under vacuum. Samples with high concentrations of Bronsted acid sites react stoichiometrically with these sites, yielding diarylalkanes. At low concentrations, the Bronsted acid sites can act catalytically resulting in isomerization reactions.

Vinylation of Aromatic Substrates with Solvolytically Generated Trisubstituted Vinyl Cations

Vinylation of aromatic compounds by α-aryl-β,β-disubstituted vinyl bromides (3a-i) in the presence of silver salts and 2,6-lutidine or 2,6-di-tert-butyl-4-methylpyridine proceed with high yields.The silver triflate assisted reaction is preferable to the silver tetrafluoroborate assisted reaction.The reaction of 1-anisyl-2,2-diphenylvinyl bromide gives a ρ+ value of -4.08 and high intramolecular selectivity with ko/kp ratios of 6.2-78.It is suggested that the reaction proceeds via intermediate α-arylvinyl cations and that the inter- and intramolecular selectivities are determined in the same transition state.