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307951-35-5

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307951-35-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 307951-35-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,7,9,5 and 1 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 307951-35:
(8*3)+(7*0)+(6*7)+(5*9)+(4*5)+(3*1)+(2*3)+(1*5)=145
145 % 10 = 5
So 307951-35-5 is a valid CAS Registry Number.

307951-35-5Relevant articles and documents

Reaction of 2-bromomethylazoles and TosMIC: A domino process to azolopyrimidines. Synthesis of core tricycle of the variolins alkaloids

Mendiola, Javier,Minguez, José M.,Alvarez-Builla, Julio,Vaquero, Juan J.

, p. 3253 - 3256 (2000)

(matrix presented) A new reaction of N-protected 2-bromomethylazoles and tosylmethyl isocyanide (TosMIC) leading to the preparation of azolopyrimidines is described. This domino sequence was used to synthesize the pyrido[3′,2′:4,5]pyrrolo[1,2-c]pyrimidine core of alkaloids variolins from 4-methoxy-2-methylpyrrolo[2,3-b]pyrimidine in two steps.

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