83576-31-2

Upstream product

• 1871-76-7 diphenylacetic acid chloride 
• 4303-71-3 triphenylmethyl sodium 
• 6068-70-8 triphenylacetyl chloride 
• 10060-17-0 (diphenylmethyl)potassium 
• 7476-11-1 1,1,3,3-tetraphenylpropane-2-one 
• 83566-44-3 tetraphenylbismuth 4-methylbenzenesulfonate 
• 102-04-5 1,3-Diphenylpropanone 
• 47252-14-2 triphenylbismuth carbonate 
• 117-34-0 2,2-diphenylacetic acid 
• 733-90-4 trityllithium 

Downstream Products

• 83576-32-3 (+/-)-2-hydroxy-1.1.1.3.3-pentaphenyl-propane 
• 19112-42-6 pentaphenylethane 

Relevant academic research and scientific papers

Transient Kinetics and Quantum Yield Studies of Nanocrystalline α-Phenyl-Substituted Ketones: Sorting Out Reactions from Singlet and Triplet Excited States

Recent work has shown that diarylmethyl radicals generated by pulsed laser excitation in nanocrystalline (NC) suspensions of tetraarylacetones constitute a valuable probe for the detailed mechanistic analysis of the solid-state photodecarbonylation reaction. Using a combination of reaction quantum yields and laser flash photolysis in nanocrystalline suspensions of ketones with different substituents on one of the α-carbons, we are able to suggest with confidence that a significant fraction of the initial α-cleavage reaction takes place from the ketone singlet excited state, that the originally formed diarylmethyl-acyl radical pair loses CO in the crystal with time constants in the sub-nanosecond regime, and that the secondary bis(diarylmethyl) triplet radical pair has a lifetime limited by the rate of intersystem crossing of ca. 70 ns.

The Chemistry of Pentavalent Organobismuth Reagents. Part 7. The Possible Role of Radical Mechanisms in the Phenylation Process for Bismuth(V), and Related Lead(IV), Iodine(III), and Antimony(V) Reagents

The phenylation reactions of bismuth(V), lead(IV), and iodine(III) have been examined to test the presence or absence of phenyl radicals.In the case of several bismuth(V) reactions the presence of phenyl radicals has been detected, but it has been shown, by use of a large excess of radical trapping agent, that these radicals have nothing to do with the phenylation process.In the same way, the other phenylation reactions fail to respond to a large excess of a radical trap.

Pentavalent Organobismuth Reagents. Part 3. Phenylation of Enols and of Enolate and other Anions

The phenylation of enols and of enolate anions of ketones, β-diketones and keto esters has been studied using a range of Bi reagents.Under basic conditions C-phenylation is observed and, even hindered, perphenylated compounds are easily synthesized.Under neutral and acidic conditions ordinary ketones do not react and enolic systems give O-phenylation.A number of other anions have been phenylated under basic conditions, including the key compound indole wich mainly gave 3-C-phenylation.All these reactions can be supposed to have one of two alternative mechanisms, which parallel the two mechanisms proposed for the phenylation of phenols.

Synthesis and X-Ray Crystal Structures of some Hindered Polyphenylated Ketones

The synthesis, properties, and X-ray structures of two highly hindered polyphenylated ketones, 2,2,6,6-tetraphenylcyclohexanone and pentaphenylacetone, are described, both being obtained using bismuth(V) chemistry.