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319432-08-1

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319432-08-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 319432-08-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,9,4,3 and 2 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 319432-08:
(8*3)+(7*1)+(6*9)+(5*4)+(4*3)+(3*2)+(2*0)+(1*8)=131
131 % 10 = 1
So 319432-08-1 is a valid CAS Registry Number.

319432-08-1Relevant articles and documents

Furan ring opening-indole ring closure: Synthesis of furo[2′, 3′:3,4]-cycloheota[1,2-b]indolium chlorides

Butin, Alexander V.,Smirnov, Sergey K.,Stroganova, Tatyana A.

, p. 623 - 628 (2007/10/03)

A new synthetic approach to furo[2′,3′:3,4]cyclohepta[1,2-b] indolium chlorides is elaborated starting from 2-acetylaminoaryldifurylmethanes or 2-aminoaryldifurylmethanes under treatment with methanolic HCl solution. The reaction proceeds in three steps: recyclization, intramolecular cyclization, and disproportionation. In this case the furan ring takes part in building up both pyrrole and seven-membered rings. The same salts can be obtained directly from 2-acetylaminobenzaldehydes and 2-methylfuran under similar conditions without isolation of corresponding 2-acetylaminoaryldifurylmethanes.

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