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33140-61-3

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33140-61-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33140-61-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,1,4 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 33140-61:
(7*3)+(6*3)+(5*1)+(4*4)+(3*0)+(2*6)+(1*1)=73
73 % 10 = 3
So 33140-61-3 is a valid CAS Registry Number.

33140-61-3Relevant articles and documents

Alternate method for the synthesis of N-alkyl/aralkyl-2-(α-hydroxy alkyl/aralkyl)benzimidazoles via regiospecific acetylation

Dubey,Reddy, P.V.V. Prasada,Srinivas

, p. 1675 - 1681 (2008/02/01)

Acetylation of 1H-2-(α-hydroxyalkyl/aryl)benzimidazoles 2 with Ac2O results in the regiospecific formation of O-acetoxy derivative 3, which on alkylation with alkylating agents in nonaqueous media under phase-transfer catalytic conditions affords N-alkyl

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