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98437-42-4

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98437-42-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98437-42-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,4,3 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 98437-42:
(7*9)+(6*8)+(5*4)+(4*3)+(3*7)+(2*4)+(1*2)=174
174 % 10 = 4
So 98437-42-4 is a valid CAS Registry Number.

98437-42-4Relevant articles and documents

Electrochemical chlorination and bromination of electron-deficient C[sbnd]H bonds in quinones, coumarins, quinoxalines and 1,3-diketones

Yu, Dan,Ji, Ruixue,Sun, Zhihui,Li, Wenjie,Liu, Zhong-Quan

supporting information, (2021/11/16)

The electrochemistry-promoted chlorination and bromination of electron-deficient C[sbnd]H bonds was developed, using quinones, coumarins, quinoxalines and 1,3-diketones. This protocol features readily available and safe halogen sources (hydrochloric acid and KBr), high site-selectivity and mild reaction conditions. It could provide an efficient access to a series of chlorinated and brominated quinones, coumarins, quinoxalines and 1,3-diketones.

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