142891-83-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142891-83-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,8,9 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 142891-83:
(8*1)+(7*4)+(6*2)+(5*8)+(4*9)+(3*1)+(2*8)+(1*3)=146
146 % 10 = 6
So 142891-83-6 is a valid CAS Registry Number.
142891-83-6Relevant articles and documents
1,4-naphthoquinones, XXII: 1,4-addition of 2,6-di-tert-butylphenol to halogenjuglone derivatives
Wurm
, p. 365 - 369 (2007/10/02)
2- and 3-Bromo- or -chloro-5-hydroxy-1,4-naphthoquinone derivatives 1a-d react with 2,6-di-tert-butylphenol and a base by 1,4-addition and HBr/HCl elimination to arylnaphthoquinones of a new type with different regioselectivity. 1a leads to 4 as the main
