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83707-39-5

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83707-39-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83707-39-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,7,0 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 83707-39:
(7*8)+(6*3)+(5*7)+(4*0)+(3*7)+(2*3)+(1*9)=145
145 % 10 = 5
So 83707-39-5 is a valid CAS Registry Number.

83707-39-5Relevant articles and documents

Pyridine N-Sulfides. Benzisothiazolopyridinium Tetrafluoroborates and Benzothiophenopyridines. Novel Heterocyclic Systems

Abramovitch, Rudolph A.,Inbasekaran, Muthiah N.,Miller, Adrian L.,Hanna, James M.

, p. 509 - 512 (2007/10/02)

2-(2-Mercaptophenyl)pyridines are prepared from the corresponding phenols and oxidized with N-chlorosuccinimide and silver tetrafluoroborate to benzisothiazolopyridine salts (4).The latter do not rearrange thermally or photochemically to benzothiophenopyridines (19) and are attacked by nucleophiles at sulfur rather than in the pyridine ring, to give the original 2-(2-mercaptophenyl)pyridine back in a reaction involving a dismutation. 19 is prepared by rearranging O-dimethylthiocarbamate to the S-aryl compound and heating the latter with strong base.

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