77989-25-4

Basic information

• Product Name: Benzene, 1-ethyl-4-(1-phenylethenyl)-
• CAS NO: 77989-25-4
• Molecular Formula: C16H16
• Molecular Weight: 208.303
• Mol File: 77989-25-4.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: Benzene, 1-ethyl-4-(1-phenylethenyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1-ethyl-4-(1-phenylethenyl)-(77989-25-4)
• EPA Substance Registry System: Benzene, 1-ethyl-4-(1-phenylethenyl)-(77989-25-4)

Safety Data

• Hazardous Substances Data: 77989-25-4(Hazardous Substances Data)

Upstream product

• 917-64-6 methyl magnesium iodide 
• 18220-90-1 4-ethylbenzophenone 
• 1779-49-3 Methyltriphenylphosphonium bromide 
• 93015-22-6 1-(4-ethyl-phenyl)-1-phenyl-ethyl hydroperoxide 
• 100-41-4 ethylbenzene 
• 460742-63-6 4-nitro-benzoic acid 1-(4-ethyl-phenyl)-1-phenyl-ethyl ester 
• 937-30-4 4-ethylacetophenone 
• 98-88-4 benzoyl chloride 

Downstream Products

• 18220-90-1 4-ethylbenzophenone 
• 6196-94-7 1-ethyl-4-(1-phenylethyl)benzene 

Relevant articles and documents

Direct 1,2-Dicarbonylation of Alkenes towards 1,4-Diketones via Photocatalysis

1,4-Dicarbonyl compounds are intriguing motifs and versatile precursors in numerous pharmaceutical molecules and bioactive natural compounds. Direct incorporation of two carbonyl groups into a double bond at both ends is straightforward, but also challenging. Represented herein is the first example of 1,2-dicarbonylation of alkenes by photocatalysis. Key to success is that N(n-Bu)4+ not only associates with the alkyl anion to avoid protonation, but also activates the α-keto acid to undergo electrophilic addition. The α-keto acid is employed both for acyl generation and electrophilic addition. By tuning the reductive and electrophilic ability of the acyl precursor, unsymmetric 1,4-dicarbonylation is achieved for the first time. This metal-free, redox-neutral and regioselective 1,2-dicarbonylation of alkenes is executed by a photocatalyst for versatile substrates under extremely mild conditions and shows great potential in biomolecular and drug molecular derivatization.

Substituent effects in solvolysis of 1,1-diphenylethyl p-nitrobenzoates. Symmetrically disubstituted and monosubstituted systems

The rates of solvolysis of 1,1-diarylethyl p-nitrobenzoates and chlorides were determined conductimetrically at 25 °C in 80% (v/v) aqueous acetone. Applying the Yukawa-Tsuno (Y-T) equation, the symmetrical (X = Y) subseries gave a precise additivity relationship for the whole substituent range with a rsym value of -3.78 and an rsym value of 0.77. While any Y subsets gave statistically less reliable Y-T correlations, the apparent ρ value changed significantly depending on the fixed Y substituents; the ρ value decreases with the more electron-donating fixed substituents Y, which is compatible with the Hammond shift of the transition state coordinate. Nevertheless, the concave correlations of the More O'Ferrall non-linearity relationship for any Y subsets are not in line with what is expected from the reactivity-selectivity relationship suggesting an anti-Hammond shift of transition state. However, we found a precise extended Bronsted relationship between the pKR+ values of 1,1-diarylethylenes and solvolysis rate process with a constant slope of α = 1.03 ± 0.03. This is direct evidence indicating that there is no significant shift of the transition-state coordinate over the whole range of substituent change. Copyright