185215-33-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 185215-33-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,5,2,1 and 5 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 185215-33:
(8*1)+(7*8)+(6*5)+(5*2)+(4*1)+(3*5)+(2*3)+(1*3)=132
132 % 10 = 2
So 185215-33-2 is a valid CAS Registry Number.
185215-33-2Relevant 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