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42470-89-3

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42470-89-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42470-89-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,4,7 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 42470-89:
(7*4)+(6*2)+(5*4)+(4*7)+(3*0)+(2*8)+(1*9)=113
113 % 10 = 3
So 42470-89-3 is a valid CAS Registry Number.

42470-89-3Relevant articles and documents

Synthesis of functionalized p-dihydrobenzoquinones and p-benzoquinones based on [3+3] cyclizations of 1,3-bis-silyl enol ethers

Ahmed, Zafar,Fischer, Christine,Spannenberg, Anke,Langer, Peter

, p. 4800 - 4806 (2007/10/03)

Functionalized mono-protected p-dihydrobenzoquinones were prepared by [3+3] cyclization of 1,3-bis-silyl enol ethers with 2-acyloxy-3-(silyloxy)alk-2-en-1-ones. Deprotection and oxidation of the products afforded the corresponding p-benzoquinones.

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