17421-82-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17421-82-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,4,2 and 1 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 17421-82:
(7*1)+(6*7)+(5*4)+(4*2)+(3*1)+(2*8)+(1*2)=98
98 % 10 = 8
So 17421-82-8 is a valid CAS Registry Number.
17421-82-8Relevant articles and documents
Improved Schmidt synthesis of 1,5-disubstituted 1H-tetrazoles from ketones
Suzuki,Hwang,Nakaya,Matano
, p. 1218 - 1220 (2007/10/02)
On treatment with an excess of sodium azide in the presence of titanium(IV) chloride in boiling acetonitrile, both aliphatic and aromatic ketones are smoothly converted to 1,5-disubstituted 1H-tetrazoles in high yields.