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9,10-Dihydroindeno[1,2-a]indene is a polycyclic aromatic hydrocarbon (PAH) with a unique molecular structure consisting of three fused benzene rings. It is a derivative of indeno[1,2-a]indene, where two hydrogen atoms are added to the molecule, resulting in a dihydro version of the parent compound. This chemical is characterized by its planar structure and delocalized π-electron system, which contributes to its stability and potential applications in various fields, such as organic synthesis, materials science, and pharmaceuticals. However, due to its complex structure and limited availability, research on 9,10-dihydroindeno[1,2-a]indene is still in its early stages, and further studies are needed to explore its properties and potential uses.

7263-76-5

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7263-76-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7263-76-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,2,6 and 3 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 7263-76:
(6*7)+(5*2)+(4*6)+(3*3)+(2*7)+(1*6)=105
105 % 10 = 5
So 7263-76-5 is a valid CAS Registry Number.

7263-76-5Downstream Products

7263-76-5Relevant academic research and scientific papers

Domino Friedel-crafts-type cyclizations of difluoroalkenes promoted by the α-cation-stabilizing effect of fluorine: An efficient method for synthesizing angular PAHs

Fuchibe, Kohei,Jyono, Hideharu,Fujiwara, Masaki,Kudo, Takao,Yokota, Misaki,Ichikawa, Junji

, p. 12175 - 12185 (2011/12/01)

In order to synthesize polycyclic aromatic hydrocarbons with nonlinear arrangements (angular PAHs), acid-promoted domino cyclizations of 1,1-difluoroalk-1-enes and 1,1-difluoroalka-1,3-dienes were studied. 1,1-Difluoroalkenes, each bearing two aryl substituents, were regioselectively protonated with FSO3H·SbF5 to generate fluorine-stabilized carbocations, which readily underwent domino Friedel-Crafts-type cyclizations to give carbocycles based on 6/n/m/6 ring systems (n,m=5-7) in good to high yields. Protonation of 1,1-difluoroalka-1,3- dienes took place at their electron-rich methylene (CH2) carbon atoms in the presence of milder acids such as camphorsulfonic acid and trifluoromethanesulfonic acid. Domino cyclizations of the resulting fluorine-stabilized allylic carbocations afford carbocycles based on 6/6/6/6 or 6/6/5/6 ring systems in high yields.

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