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343255-27-6

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343255-27-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 343255-27-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,3,2,5 and 5 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 343255-27:
(8*3)+(7*4)+(6*3)+(5*2)+(4*5)+(3*5)+(2*2)+(1*7)=126
126 % 10 = 6
So 343255-27-6 is a valid CAS Registry Number.

343255-27-6Relevant articles and documents

Intermediates useful for the preparation of antihistaminic piperidine derivatives

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Page column 101, (2010/01/30)

The present invention is related to a novel intermediates and processes which are useful in the preparation of certain antihistaminic piperidine derivatives of the formula whereinW represents —C(=O)— or —CH(OH)—;R1 represents hydrogen or hydroxy;R2 represents hydrogen;R1 and R2 taken together form a second bond between the carbon atoms bearing R1 and R2;n is an integer of from 1 to 5;m is an integer 0 or 1;R3 is —COOH or —COOalkyl wherein the alkyl moiety has from 1 to 6 carbon atoms and is straight or branched each of A is hydrogen or hydroxy; and pharmaceutically acceptable salts and individual optical isomers thereof,with the proviso that where R1 and R2 are taken together to form a second bond between the carbon atoms bearing R1 and R2 or where R1 represented hydroxy, m is an integer 0.

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