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820964-13-4

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820964-13-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 820964-13-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,2,0,9,6 and 4 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 820964-13:
(8*8)+(7*2)+(6*0)+(5*9)+(4*6)+(3*4)+(2*1)+(1*3)=164
164 % 10 = 4
So 820964-13-4 is a valid CAS Registry Number.

820964-13-4Downstream Products

820964-13-4Relevant articles and documents

Novel synthesis of bicycles with fused pyrrole, indole, oxazole, and imidazole rings

Katritzky, Alan R.,Singh, Sanjay K.,Bobrov, Sergey

, p. 9313 - 9315 (2007/10/03)

Reactions of benzotriazol-1-yl(1H-pyrrol-2-yl)methanone 10 and benzotriazol-1-yl(1H-indol-2-yl)methanone 11 with diverse ketones, isocyanates, and isothiocyanates in the presence of base afforded pyrrolo[1,2-c]oxazol-1-ones 1, oxazolo[3,4-a]indol-1-ones 2, pyrrolo[1,2-c]imidazoles 3, and imidazo[1,5-a]indoles 4 by a simple one-step procedure.

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