37913-11-4

Usage

Structure

Cyclic compound with a phenanthrene backbone

Classification

Ketone

Carbonyl group

Bonded to two alkyl or aryl groups

Usage

Organic synthesis and as a building block for complex molecules

Properties

Exhibits anti-inflammatory and antitumor properties

Potential applications

Pharmaceutical research and development

Relevance

Unique structure and reactivity for studying organic chemical reactions and mechanisms

Upstream product

• 7402-06-4 3,4-diphenylcyclopent-3-enone 
• 72471-16-0 methyl 3,3a-dihydro-3a-hydroxy-2-oxo-2H-cyclopentaphenanthrene-1-carboxylate 
• 72471-15-9 ethyl 3,3a-dihydro-3a-hydroxy-2-oxo-2H-cyclopentaphenanthrene-1-carboxylate 
• 7646-85-7 Zinc chloride 
• 72471-20-6 2-oxo-2,3-dihydro-1H-cyclopenta[l]phenanthrene-1-carboxylic acid methyl ester 
• 84-11-7 9,10-phenanthrenequinone 
• 101736-99-6 phenanthrene-9,10-diyldi-acetic acid 

Downstream Products

• 68940-62-5 1-[1-(4-Methoxy-phenyl)-meth-(E)-ylidene]-3-[1-(4-methoxy-phenyl)-meth-(Z)-ylidene]-1,3-dihydro-cyclopenta[l]phenanthren-2-one 
• 121221-39-4 2-phenylcyclopenta[l]phenanthrene 
• 235-92-7 1H-cyclopenta[l]phenanthrene 
• 201022-11-9 1-trimethylsilyl-2-phenyl-cyclopenta[l]phenanthrene 
• 117775-61-8 C₂₄H₂₀N₂O₂S 

Relevant academic research and scientific papers

Molybdenum complexes containing substituted cyclopenta[l]phenanthrenyl ligand

The synthesis of new cyclopenta[l]phenanthrenyl complexes [(η5-C17H10Me)(η3-C3H5)Mo(CO)2] and [(η5-C17H9(COOMe)N(CH2)4)(η3-C3H5)Mo(CO)2] is described. Although these compounds are structural analogues their reactivity is different. Protonation of [(η5-C17H10Me)(η3-C3H5)Mo(CO)2] gives a stable ionic compound [(η5-C17H10Me)Mo(CO)2(NCMe)2][BF4] while its analogue containing both tertiary amino and carboxylic ester groups [(η5-C17H9(COOMe)N(CH2)4)(η3-C3H5)Mo(CO)2] decomposes under the same conditions. [(η5-C17H10Me)Mo(CO)2(NCMe)2][BF4] reacts with cyclopentadiene to give a stable η4-complex [(η4-C5H6)(η5-C17H10Me)Mo(CO)2][BF4] that was successfully oxidized to the Mo(IV) dicationic compound [(η5-C5H5)(η5-C17H10Me)Mo(CO)2][Br][BF4].

Penultimate effect in ethylene-styrene copolymerization and the discovery of highly active ethylene-styrene catalysts with increased styrene reactivity

For the first time commercially relevant catalysts for the copolymerization of ethylene and styrene have been identified. The catalysts maintain very high copolymer efficiencies at relatively high reactor temperatures without sacrificing styrene comonomer

Synthesis of 4-ketocyclopentene and cyclopentadiene compounds

A process for forming 4-ketocyclopentene and substituted 4-ketocyclopentene compounds starting from the corresponding 1-carbohydrocarbyloxy-2-keto-4-hydroxy-5-cyclopentene by reduction followed by decarboxylation using zinc dichloride or zinc dibromide. The ketone may thereafter be converted to a cyclopentadiene compound by reducing the ketone to form an alcohol, replacing the hydroxyl functionality of the alcohol under substitution conditions with a leaving group, and deprotonating the resulting product under base induced elimination conditions to form the cyclopentadiene compound. Alternatively functionalized cyclopentadienyl compounds can be produced without isolation of an unsubstituted cyclopentadienyl compound by combining the elimination and deprotonation steps with a replacement step in a single unit operation.

1H and 13C Nuclear Magnetic Resonance Reinvestigation of the Dibenzocyclononatetraenyl Anion and Its 5,9-Diphenyl Derivative. Planarity vs Nonplanarity

It is found that the dibenzocyclononatetraenyl anion is readily transformed into the stable 1H-cyclopentaphenanthren-1-yl anion.Earlier reported NMR data of this compound were incorrectly assigned to a planar structure of the dibenzocyclononatetraenyl anion.The nonplanarity of the initially formed nine-membered ring anion was confirmed both experimentally and theoretically.The ring-closure process does not take place in the anion of the 5,9-diphenyl derivative, which retains a nonplanar conformation of the nine-membered ring.