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343945-82-4

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343945-82-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 343945-82-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,3,9,4 and 5 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 343945-82:
(8*3)+(7*4)+(6*3)+(5*9)+(4*4)+(3*5)+(2*8)+(1*2)=164
164 % 10 = 4
So 343945-82-4 is a valid CAS Registry Number.

343945-82-4Downstream Products

343945-82-4Relevant articles and documents

PYRROLOINDOLES. 6. NEW SYNTHESIS OF 1H,5H-PYRROLOINDOLE AND 3H,6H-PYRROLOINDOLE

Samsoniya, Sh. A.,Kadzhrishvili, D. O.,Gordeev, E. N.,Zhigachev, V. E.,Kurkovskaya, L. N.,Suvorov, N. N.

, p. 382 - 385 (1982)

Ethyl pyruvate 1-acetyl-5-indolinylhydrazone was obtained by diazotization of 1-acetyl-5-aminoindoline with subsequent reduction of the diazonium salt and condensation of the hydrazine with ethyl pyruvate.A mixture of hydrogenated derivatives of linear and angular pyrroloindoles is formed as a result of cyclization of the hydrazone in polyphosphoric acid esters.Subsequent hydrolysis, decarboxylation, and dehydrogenation lead to 1H,5H-pyrroloindole and 3H,6H-pyrroloindole.

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