4344-45-0

Upstream product

• 56-23-5 tetrachloromethane 
• 5694-69-9 phenyl-(2-phenyl-[1,3]dioxolan-2-yl)-methanol 
• 104-15-4 toluene-4-sulfonic acid 
• 119-53-9 2-hydroxy-2-phenylacetophenone 
• 107-21-1 ethylene glycol 
• 6315-52-2 1,2-bis-tosyloxyethane 

Downstream Products

• 101119-33-9 2,3-dichloro-2,3-diphenyl-[1,4]dioxane 
• 4336-10-1 cis-2,3-diphenyl-[1,4]dioxane 
• 4336-10-1 (+/-)-trans-2,3-diphenyl-[1,4]dioxane 
• 94527-43-2 2,3-Dimethoxy-2,3-diphenyl-1,4-dioxan 
• 6963-19-5 2,3-Diethoxy-2,3-diphenyl-1,4-dioxan 
• 94527-42-1 4a,8a-Diphenyl-2,3,4a,6,7,8a-hexahydro-p-dioxino<2,3-b>-p-dioxin 
• 113760-07-9 cis-1,6-Diphenyl-2,5,7,10-tetraoxabicyclo<4.4.0>decane 
• 5623-26-7 α-methylbenzoin 
• 93831-39-1 α-methyl-α-vinyloxydeoxybenzoin 
• 67592-95-4 1,6-diphenyl-2,5,7,8-tetraoxabicyclo<4.2.0>octane 
• 94-49-5 1,2-ethanediol, dibenzoate 
• 108295-21-2 3-azido-5,6-dihydro-2,3-diphenyl-1,4-dioxin-2-ol 
• 621-14-7 diphenyl succinate 
• 6252-00-2 phenyl-(2-phenyl-1,3-dioxolan-2-yl)methanone 

Relevant academic research and scientific papers

Pd-catalyzed inter- and intramolecular carbene transfer from group 6 metal-carbene complexes

The use of group 6 metal-carbene complexes in inter- and intramolecular carbene transfer reactions has been studied. Thus, pentacarbonyl[(aryl)(methoxy)carbene]chromium(0) and tungsten complexes, 10, efficiently dimerize at room temperature in the presenc

Synthesis of 9,10-phenanthrenequinones by photocyclization of derivatives of benzoins: Scope and limitation of the methodology

Symmetric 9,10-phenanthrenequinones with methyl, methoxy, and chloro substituents at the 3 and 6 positions have been synthesized by photocyclization of 4,5-bis-(aryl)-2-phenyl-1,3,2-dioxaboroles and 2,3- diarydioxenes followed by oxidative hydrolysis.

The electron spin resonance spectra of dioxene radical cations

The electron spin resonance spectra of the radical cations of dioxene (1a), 2,3-dimethyldioxene (1b), 2,3-diphenyldioxene (1c), and benzodioxane (2) in fluid solution have been observed and analysed, with the help of ENDOR spectroscopy in the case of 1c.It is concluded that in 1c the molecule has overall C2 molecular symmetry.In all four compounds, the pseudo-axial and pseudo-equatorial protons of the methylene groups in the half-chair dioxene rings are distinguished by different hyperfine coupling constants, and simulation of the spectra over a range of temperatures has given the Arrhenius parameters for the ring inversion of 1a, 1b, and 2.Key words: ESR spectra, radical cation, 1,4-dioxene, inversion barrier.

Unsaturated Crown Ethers. 3. Syntheses of Stilbeno Crown Ethers

A series of 6-, 9-, and 15-membered monostilbeno crown ethers (3) and 18-, 24-, and 30-membered distilbeno crown ethers (4), some of which are new compounds, were synthesized in the base-induced reactions of benzoin (1) with oligoethylene glycol ditosylates (2a-d) in homogeneous and heterogeneous solutions.The template effect is shown to be effective in controlling product yields and 4/3 ratios.

EFFECTS OF HETEROATOM SUBSTITUENTS ON THE PROPERTIES OF 1,2-DIOXETANES

Nitrogen and sulfur-substituted dioxetanes exhibit dramatically lower activation energies for decomposition compared to the corresponding oxygen-bearing dioxetane.A mechanism involving intramolecular electron-transfer processes is proposed for the cleavage of these unstable dioxetanes.

DIOXETANO-CROWN ETHERS. STABILIZATION THROUGH COMPLEXATION WITH METAL IONS

The first members of dioxetanocrown ethers 3 and 4 were prepared in methylene blue-sensitized,photooxygenations of 9- and 18-membered stilbecrown ethers 1 and 2, and the activation paramethers for the thermolyses of 3 and 4 were obtained.Thermal decomposition of the bis-dioxetano-18-crown-6 4 was decelerated,or accelerated in the presence of alkali metal salts depending upon the nucleophilicity of the counter anion.