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623562-27-6

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623562-27-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 623562-27-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,2,3,5,6 and 2 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 623562-27:
(8*6)+(7*2)+(6*3)+(5*5)+(4*6)+(3*2)+(2*2)+(1*7)=146
146 % 10 = 6
So 623562-27-6 is a valid CAS Registry Number.

623562-27-6Downstream Products

623562-27-6Relevant articles and documents

Preparation of substituted 1,3-dihydro-2H-imidazo[4,5-c]pyridin-2-ones

Bakke, Jan M.,Gautun, Hanna S. H.,Svensen, Harald

, p. 585 - 591 (2003)

A new synthetic route to 6-substituted-imidazo[4,5-c]pyridin-2-ons from 4-aminopyridine has been investigated. 4-Aminopyridine protected as alkyl carbamates were nitrated with dinitrogen pentoxide to the corresponding methyl, i-propyl and t-butyl 3-nitropyridin-4-yl carbamates (5a-c) in 51-63% yields. Attempts to substitute these in the 6-position by the ONSH and the VNS techniques succeeded with butylamine and the t-butyl carbamate 9. From the methyl or t-butyl 3-nitropyridin-4-yl carbamates 5a, 5c 1,3-dihydro-2H-imidazo[4,5-c]pyridin-2-one (1) was formed in 73 and 39% yields, respectively. t-Butyl 6-N-butylamin-3-aminopyridin-4-yl carbamate (6) gave 6-butylamino-1,3-dihydro-2H-imidazo[4,5-c]pyridin-2-one (7) in 53% yield.

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