187222-12-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 187222-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,7,2,2 and 2 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 187222-12:
(8*1)+(7*8)+(6*7)+(5*2)+(4*2)+(3*2)+(2*1)+(1*2)=134
134 % 10 = 4
So 187222-12-4 is a valid CAS Registry Number.
187222-12-4Relevant articles and documents
Synthesis of 2-hydroxymethyl-3,5-dimethyl-4-methoxypyridine : A key intermediate for omeprazole
Chou, Shan-Yen,Chen, Shyh-Fong
, p. 77 - 85 (1997)
A synthesis of 2-hydroxymethyl-3,5-dimethyl-4-methoxypyridine, a key intermediate for the preparation of gastric acid inhibiting compound omeprazole, is described. The procedure consists of preparation of pyrone, pyridone and pyridine derivatives sequentially.
