4539-31-5

Upstream product

• 782-05-8 (Z)-2,3-diphenyl-2-butene 
• 782-06-9 (E)-2,3-diphenylbutene 
• 769-59-5 3-phenyl-butan-2-one 
• 598-30-1 sec.-butyllithium 
• 74-88-4 methyl iodide 

Downstream Products

• 81052-75-7 (2S,3R,4S,5R)-2,5-Dimethyl-2,5-diphenyl-tetrahydro-furan-3,4-dicarbonitrile 
• 99553-73-8 cis-3,5-dimethyl-3,5-diphenyl-1,2,4-trioxolane 
• 99553-73-8 trans-3,5-dimethyl-3,5-diphenyl-1,2,4-trioxolane 
• 81052-74-6 (2S,3S,4S,5R)-2,5-Dimethyl-2,5-diphenyl-tetrahydro-furan-3,4-dicarbonitrile 
• 2575-20-4 3,3-diphenylbutan-2-one 
• 81052-85-9 (2S,3S,4S,5R)-2,5-Dimethyl-2,5-diphenyl-tetrahydro-furan-3,4-dicarboxylic acid dimethyl ester 

Relevant academic research and scientific papers

Synthesis and photochemical behaviour of 4-nitroimidazoles in the presence of oxygen

Synthesis and photochemical properties of 1-aryl-4-nitroimidazoles are described. These compounds are good sensitizers of superoxide ion. Only 1-phenyl-2-methyl-4-nitroimidazole is a photosensitizer of singlet oxygen.

THE PHOTOCHEMICAL PREPARATION OF OZONIDES BY ELECTRON-TRANSFER PHOTO-OXYGENATION OF EPOXIDES

9,10-Dicyanoanthracene (DCA) sensitizes the electron-transfer photo-oxygenation of epoxides in oxygen-saturated acetonitrile to form ozonides.Epoxides with oxidation potentials lower than 2 V vs SCE quench the fluorescence of DCA and are converted to the

Photoinduced Electron Transfer Reaction. Part 3. 9,10-Dicyanoanthracene-sensitized Photo-oxidation of Electron-rich Stilbene Oxides

The 9,10-dicyanoanthracene (DCA)-sentisized photo-oxygenation of the electron-rich stilbene oxides (1) gives the ozonides (2) almost quantitatively.The fluorescence of DCA is quenched by (1) at a diffusion-controlled rate and the above reaction is quenched by polymethoxybenzenes which indicates that an electron transfer mechanism is involved.The quantum yield for ozonide formation varies from 0.6 for trans-2-(4-methoxyphenyl)-3-phenyloxirane (1d) to 2.4 for trans-2,3-bis(4-methoxyphenyl)-2,3-diethyloxirane (1h), suggesting a duplex reaction mechanism such as photo-oxygenation by superoxide and a Barton mechanism after the initial electron transfer from the epoxides (1) to the excited singlet state of DCA.

PHOTO- AND THERMOINDUCED GENERATION OF 1,3-DIARYL CARBONYL YLIDES FROM 2,3-DIARYLOXIRANES. 1,3-DIPOLAR CYCLOADDITIONS TO DIPOLAROPHILES

A group of symmetrically substituted 2,3-diaryloxiranes have been studied as photoprecursprs for carbonyl ylides.The stereochemistry of the adducts obtained upon interception of these 4n pi-transient systems with a variety of dipolarophiles provides information on the mode(s) of electrocyclic opening of the oxiranes to carbonyl ylides, as well as the mechanism of the 4n+2 cycloaddition process.The stereochemistry of the dipolarophiles is preserved in the cycloadducts, which is consistent with a concerted addition process; however, solvent effects, steric hindrance, and possibly secondary orbital overlap factors all may play a role in determining the product distribution.