525-18-8

Basic information

• Product Name: dihydroindeno-2',1':2,3-fluorene
• Synonyms: dihydroindeno-2',1':2,3-fluorene;ellagene;10,12-Dihydroindeno[2,1-b]fluorene;cis-Fluoracene
• CAS NO: 525-18-8
• Molecular Formula: C₂₀H₁₄
• Molecular Weight: 254.33
• Mol File: 525-18-8.mol

Chemical Properties

• Appearance: /
• CAS DataBase Reference: dihydroindeno-2',1':2,3-fluorene(CAS DataBase Reference)
• NIST Chemistry Reference: dihydroindeno-2',1':2,3-fluorene(525-18-8)
• EPA Substance Registry System: dihydroindeno-2',1':2,3-fluorene(525-18-8)

Safety Data

• Hazardous Substances Data: 525-18-8(Hazardous Substances Data)

Upstream product

• 114202-91-4 m-terphenyl-4',6'-dicarboxylic acid 
• 91997-32-9 4,6-dibromobenzene-1,3-dicarboxylic acid dichloride 
• 1263048-16-3 1,5-dimethyl-2,4-bis(2-chlorophenyl)benzene 
• 108-38-3 m-xylene 
• 108-36-1 1,3-dibromobenzene 
• 501-65-5 diphenyl acetylene 
• 915224-50-9 diethyl 4,6-dibromoisophthalate 
• 24063-27-2 4,6-dibromobenzene-1,3-dicarboxylic acid 
• 615-87-2 1,5-dibromo-2,4-dimethylbenzene 
• 4612-28-6 1,3-phenylenediboronic acid 
• 610-94-6 2-bromobenzoic acid methyl ester 
• 269410-07-3 1,2-bis(4,4,5,5-tetramethyl-[1,3,2]dioxabororan-2-yl)benzene 
• 35510-03-3 1,5-dibromo-2,4-bis(bromomethyl)benzene 
• 204928-04-1 5'-hydroxy-m-terphenyl-4',6'-dicarboxylic acid diethyl ester 

Downstream Products

• 1377319-64-6 5-(3,5-di-tert-butylphenyl)-11-(4-diphenylaminostyryl)-1,1,3,3-tetraethylindeno[2,1-b]fluorene 
• 1377319-65-7 11-(3,5-di-tert-butylphenyl)-1,1,3,3-tetraethyl-1,3-dihydroindeno[2,1-b]fluorene-5-carbaldehyde 

Relevant articles and documents

NOVEL COMPOUNDS FOR ORGANIC ELECTRONIC MATERIAL AND ORGANIC ELECTRONIC DEVICE USING THE SAME

PROBLEM TO BE SOLVED: To provide: novel compounds for organic electronic material which may be included in a hole transport layer, electron transport layer or hole injection layer or may be used as a host or dopant; and an organic electronic element using

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The structure-property relationship study of electron-deficient dihydroindeno[2,1-b]fluorene derivatives for n-type organic field effect transistors

A bridged syn triphenylene derivative, namely 5,7-dihydroindeno[2,1-b]fluorene, functionalized with dicyanovinylene units (2,1-b)-IF(=C(CN)2)2 has been designed, synthesized and characterized. Its optical and electrochemical properti

Palladium-Catalyzed Reaction of Haloarenes with Diarylethynes: Synthesis, Structural Analysis, and Properties of Methylene-Bridged Arenes

Fluorenes and methylene-bridged polyarenes were easily and efficiently synthesized from haloarenes (or aryl triflates) and diarylethynes by a one-pot, two-step procedure. This protocol involves the palladium-catalyzed cycloisomerization and a subsequent base-mediated retro-aldol condensation. A major advantage is that the starting materials need not have ortho functional groups to complete the annulation. The backbone of the designed products was enlarged using dihaloarenes, highly π-conjugated haloarenes, or diarylalkynes. The mechanism of the formation of benzo[a]fluorene was investigated. The bowl-shaped structure of methylene-bridged indenocorannulene was verified by X-ray crystallography. The photophysical and electrochemical properties of the products thus prepared were investigated.

Synthesis of methylene-bridge polyarenes through palladium-catalyzed activation of benzylic carbon-hydrogen bond

In the presence of palladium(II) acetate [Pd(OAc)2] and an N-heterocyclic carbene (NHC) ligand, fluorene derivatives can be generated in good to excellent yields from 2-halo-2′-methylbiaryls through the benzylic C-H bond activation (14 examples; 81-97% yields). The scope and limitations of this protocol have been examined. A wide range of functional groups, such as alkyl, alkoxy, ester, nitrile, and others, is able to tolerate the reaction conditions herein. The cyclization of an isotope-labelled biphenyl gave the corresponding product with a primary kinetic isotope effect (k H/kD=4.8:1), which indicates that the rate-determining step of this reaction is the activation of the benzylic C-H bond. Moreover, indenofluorenes were also accessed in excellent results from terphenyls (3 examples; 91-92% yields). The cascade reaction of 2,6-dichloro-2′- methylbiphenyl with diphenylacetylene produced 8,9-diphenyl-4H-cyclopenta[def] phenanthrene in 60% yield through the activation of an aryl and a benzylic C-H bond. Copyright

Palladium-catalyzed double cross-coupling reaction of vic-diborylalkenes and -arenes with vic-bromo(bromomethyl)arenes

Efficient annulation of vic-diborylalkenes and -arenes with vic-bromo(bromomethyl)arenes has been achieved, using Pd(PPh3) 4 as a catalyst in the presence of Cs2CO3 and water in THF at 60°C, giving rise to the c