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209797-66-0

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209797-66-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 209797-66-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,7,9 and 7 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 209797-66:
(8*2)+(7*0)+(6*9)+(5*7)+(4*9)+(3*7)+(2*6)+(1*6)=180
180 % 10 = 0
So 209797-66-0 is a valid CAS Registry Number.

209797-66-0Relevant articles and documents

A Study on Ester Formylhydrazones

Ikizler, Aykut A.,Yildirim, Nuri

, p. 377 - 380 (1998)

A series of ester formylhydrazones 2 were synthesized from the reaction of alkyl imidate hydrochlorides 1 with formylhydrazine. Treatment of 2 with hydrazine hydrate, ethyl carbazate and tert-butyl carbazate led to the formation of 3-alkyl-4-amino-, 3-alkyl-4-ethoxycarbonylamino- and 3-alkyl-4-tert-butoxycarbonylamino-4H-1,2,4-triazoles 3-5, respectively. Reaction of compounds 2 with formylhydrazine gave N,N′-diformylhydrazine 6. Compounds 2 were reacted with 2,5-dimethoxytetrahydrofuran to afford 3-alkyl-4-(1H-pyrrol-1-yl)-4H-1,2,4-triazoles 8.

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