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89651-57-0

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89651-57-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89651-57-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,6,5 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 89651-57:
(7*8)+(6*9)+(5*6)+(4*5)+(3*1)+(2*5)+(1*7)=180
180 % 10 = 0
So 89651-57-0 is a valid CAS Registry Number.

89651-57-0Relevant articles and documents

Inter- and intramolecular addition of ester anions to nicotinium salts. A facile approach to nauclefine and ellipticine derivatives

Wanner,Koomen,Pandit

, p. 3673 - 3681 (2007/10/02)

Reaction of ester anions with 1-(2'-indolyl-ethyl)nicotinium chloride and 1-(1'-methyl-2'-indolylethyl)-nicotinium chloride leads to 2,7-naphthyridine-1,3-diones. Acid catalyzed cyclization of the latter yield pentacyclic napthyridocarboline derivatives.

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