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945934-73-6

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945934-73-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 945934-73-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,5,9,3 and 4 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 945934-73:
(8*9)+(7*4)+(6*5)+(5*9)+(4*3)+(3*4)+(2*7)+(1*3)=216
216 % 10 = 6
So 945934-73-6 is a valid CAS Registry Number.

945934-73-6Relevant articles and documents

PROCESS FOR THE PREPARATION OF MONTELUKAST AND ITS SALTS THEREOF

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, (2011/05/03)

The present invention relates to the alkyl amine salts of Montelukast and methods for their preparation and conversion of Montelukast amine salts to Montelukast or Montelukast alkali/alkaline salt.

Purification process of montelukast and its amine salts

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Page/Page column 8-9, (2008/06/13)

It comprises a process for the purification of Montelukast, or its salts or its solvates, including any stereoisomer or mixture thereof, which comprises converting Montelukast acid or a solvate thereof, including any stereoisomer or mixtures thereof, into an amine salt selected from the group consisting of cyclohexylamine, tris-(hydroxymethyl)aminomethane, L-(+)-treo-2-amino-1-phenyl-1,3-propanediol, R-(+)-α-methylbenzylamine, and L-(+)-α-phenylglycinol salt, in the presence of an appropriate solvent. It also comprises novel salts of Montelukast, in particular, cyclohexylamine, tris-(hydroxymethyl)aminomethane, L-(+)-treo-2-amino-1-phenyl-1,3-propanediol, R-(+)-α-methylbenzylamine, and L-(+)-α-phenylglycinol salts.

PROCESS FOR THE PREPARATION OF MONTELUKAST, AND INTERMEDIATES THEREFOR

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Page/Page column 26-27, (2008/06/13)

The invention relates to processes for making montelukast and to intermediates for use in the process, in particular compounds of formulas 2-7: L=OAc, OTs, OTf5OMs; where X=Cl, Br, I.

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