89959-76-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89959-76-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,5 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 89959-76:
(7*8)+(6*9)+(5*9)+(4*5)+(3*9)+(2*7)+(1*6)=222
222 % 10 = 2
So 89959-76-2 is a valid CAS Registry Number.
89959-76-2Relevant articles and documents
Synthesis of 4-n-alkyl-2-amino-3-thiophenecarboxylates
Noe,Buchstaller,Siebert
, p. 833 - 836 (2007/10/03)
A modification of the Gewald reaction is presented, which renders 4-n-alkyl substituted 2-aminothiophene derivatives 9 accessible, which bear no substituent at position 5. The three step procedure involves monotosylation of diols 2, oxidation of the secon
