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103215-02-7

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103215-02-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 103215-02-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,2,1 and 5 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 103215-02:
(8*1)+(7*0)+(6*3)+(5*2)+(4*1)+(3*5)+(2*0)+(1*2)=57
57 % 10 = 7
So 103215-02-7 is a valid CAS Registry Number.

103215-02-7Relevant articles and documents

Chinone von Benzo- und Dibenzokronenethern

Dietl, F.,Gierer, G.,Merz, A.

, p. 626 - 631 (2007/10/02)

The preparation of the 1,4-quinones of benzocrown-5 (1), benzocrown-6 (2), and dibenzocrown-6 (3) and their quinols is described.The quinones are obtained by Fremy salt oxidation of the corresponding 3-hydroxybenzo-crown ethers which are readily accessible by a double protective group synthesis from 1,2,3-trihydroxybenzene.The synthetic pathway also provides a general high yield preparation of 2,3-dialkoxy-1,4-benzoquinones.The new crown ethers are characterised by 1H- and 13C-N.M.R. as well as U.V. spectroscopy.Non-aqueous redox potentials aredetermined by cyclic voltammetry.Crystalline complexes of 1 and 2 with various ammonium, alkali, and alkaline earth cations are also described.

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