185215-29-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 185215-29-6 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, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 185215-29:
(8*1)+(7*8)+(6*5)+(5*2)+(4*1)+(3*5)+(2*2)+(1*9)=136
136 % 10 = 6
So 185215-29-6 is a valid CAS Registry Number.
185215-29-6Relevant 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