Cas 80206-42-4,4,6-dimethylpyridine-2-carboxylic acid ethyl ester

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Check Digit Verification of cas no

The CAS Registry Mumber 80206-42-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,2,0 and 6 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 80206-42:
(7*8)+(6*0)+(5*2)+(4*0)+(3*6)+(2*4)+(1*2)=94
94 % 10 = 4
So 80206-42-4 is a valid CAS Registry Number.

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80206-42-4Relevant articles and documents

(Co)cyclodimerization of Alkynes by Aluminum Halides. Synthesis of Pyridines from Aluminum Halide ? Complexes of Cyclobutadienes and Nitriles

Hogeveen, H.,Kingma, R. F.,Kok, D. M.

, p. 989 - 997 (1982)

The Lewis acid promoted cyclodimerization of monoalkyl-substituted alkynes and cocyclodimerization of monoalkyl(aryl)- and dialkyl-substituted alkynes are described.It has been found that the corresponding aluminum halide ? complexes of the cyclobutadiene

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80206-42-4