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245070-91-1

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245070-91-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 245070-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,5,0,7 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 245070-91:
(8*2)+(7*4)+(6*5)+(5*0)+(4*7)+(3*0)+(2*9)+(1*1)=121
121 % 10 = 1
So 245070-91-1 is a valid CAS Registry Number.

245070-91-1Relevant articles and documents

Novel [2 + 2] photocycloaddition-induced rearrangement of bichromophoric naphthalene-tethered resorcinol ethers

Hoffmann, Norbert,Pete, Jean-Pierre,Inoue, Yoshihisa,Mori, Tadashi

, p. 2315 - 2322 (2007/10/03)

The first examples of sequential photocycloaddition-rearrangement reactions of naphthalenetethered resorcinol ethers are described. Bichromophoric aromatic compounds with naphthalene and resorcinol ether moieties were irradiated in the presence/absence of a small amount of acid to give the corresponding cycloaddition-rearrangement products. From the determination of quantum yields, steady-state fluorescence spectral studies, and fluorescence lifetime measurements, the mechanism of this novel photoinduced multistep reaction was elucidated to involve the initial intramolecular exciplex formation, followed by the intramolecular [2 + 2] photocycloaddition between the two aromatic rings and the subsequent acid-catalyzed skeletal rearrangement of the resulting cyclobutane derivative leading to the final products.

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