16259-59-9

Upstream product

• 611-97-2 bis(p-methylphenyl)-methanone 
• 542-92-7 cyclopenta-1,3-diene 
• 1141-08-8 4,4'-dimethylthiobenzophenone 

Downstream Products

• 77669-75-1 1-(5-Di-p-tolylmethylene-cyclopenta-1,3-dienyl)-ethanone 
• 165822-95-7 [(1-4-η)-6,6-bis(4-methylphenyl)fulvene]methylbis(trimethylphosphine)cobalt(I) 
• 165681-49-2 [(1-3-η):(1-3-η)-4,4'-bis[bis(4-methylphenyl)methylidene]-5,5'-dihydrofulvalene]hexakis(trimethylphosphino)dicobalt(I) 
• 676647-56-6 cyclopentadienyl(octamethyloctahydrodibenzofluorenyl)di-p-tolylmethane 
• 953814-85-2 C₂₉H₂₆ 
• 1253597-16-8 C₃₃H₂₈ 

Relevant academic research and scientific papers

Visible-light-induced [4 + 2] cycloaddition of pentafulvenes by organic photoredox catalysis

We have developed thioxanthylium photoredox catalyzed [4 + 2] cycloaddition of pentafulvenes at room temperature under green light irradiation, which affords tetrahydrocyclopenta[b]chromenes with high regioselectivities. The present reaction provides a sustainable approach to carry out the cycloaddition of pentafulvenes without the use of transition metal catalysts or high-temperature conditions. This procedure enables a mild and straightforward access to 1,3a,9,9a-tetrahydrocyclopenta[b]chromenes. The quantum yield of the reaction (Φ = 0.15) indicates that the reaction would mainly proceed via photocatalytic pathways.

Method for producing fulvene

PROBLEM TO BE SOLVED: To provide a method for producing a fulvene in which the reaction efficiently proceeds regardless of the nature of the substituent group which a raw-material ketone, especially a ketone not having an α-proton, possesses. SOLUTION: Provided is a method for producing a fulvene including a step to condense a ketone not possessing an α-proton, and an alkali metal salt of cyclopentadiene in the presence of a Lewis acid. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT

The bridged cyclopentadienyl indenyl (fluorenyl) zirconocene complexes for polyethylene macromonomers

The synthesis of long-chain branched polyethylene includes the generation of vinyl-terminated polyethylene macromonomers and the copolymerization of these macromonomers with ethylene. Four new bridged cyclopentadienyl indenyl (fluorenyl) zirconocene compl

FLUORENE DERIVATIVE, TRANSITION METAL COMPOUND, CATALYST FOR OLEFIN POLYMERIZATION, AND PROCESS FOR PRODUCING OLEFIN POLYMER

A novel fluorene derivative useful as a catalyst ingredient for olefin polymerization; a transition metal compound containing the fluorene derivative as part of ligands; an olefin polymerization catalyst comprising the transition metal compound; and a pro

CROSSLINKED METALLOCENE COMPOUND FOR OLEFIN POLYMERIZATION AND METHOD OF POLYMERIZING OLEFIN WITH THE SAME

The bridged metallocene compound or the olefin polymerization catalyst which comprises the compound, enables high polymerization activity in polymerizing one or more monomers selected from ethylene and α-olefins. The bridged metallocene compound contains

Cs-symmetric hafnocene complexes for synthesis of syndiotactic polypropene

Three new C s-symmetric ansa-hafnocene complexes such as dichloro[η10-2,4-cyclopentadienyl-1-ylidenebis (4-methyldiphenyl-methylen)[2,7-bis(1,1-di-methylethyl)-9H-fluorene-9- ylidene]]hafnium (2) were synthesized which produce partiell syndiotactic polypropylenes with very high molecular weights. The influence of the methyl and methoxy substitution in the bridge was studied on the activity, tacticity, and molar mass. The hafnocene-MAO catalysts (1-4) were active up to polymerisation temperatures of 90 °C and produces 55 000 kg polymer in 1 h by 1 mol of hafnocene. The molecular weight of the obtained elastic polypropylene reaches 2.2 million g mol-1.

PREPARATION OF 6,6-DIARYLFULVENE COMPLEXES OF RHODIUM(I) AND THEIR REACTION WITH DIOXYGEN

Complexes (1+) react with 6,6-diarylfulvenes C5H4C(C6H4X-4)2 to yield products C5H4C(C6H4X-4)2L2>(1+) in which the fulvene is bound to the metal through the five-membered ring.Corresponding reactions with (1+) yield complexesC5H4C(C6H4X-4)22>(1+) containing two fulvene ligands.Atmospheric oxidation of these complexes results in the linking of the exocyclic carbon atoms in the two fulvene ligands by a peroxide bridge.If the initial attack by O2 is on the metal, the subsequent rearrangement may be viewed either as a transfer of singlet oxygen from metal to ligands or as a nucleophilic attack by peroxide on the (probably somewhat positively charged) exocyclic carbon atoms of the fulvene ligands.