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1112937-27-5

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1112937-27-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1112937-27-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,1,2,9,3 and 7 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1112937-27:
(9*1)+(8*1)+(7*1)+(6*2)+(5*9)+(4*3)+(3*7)+(2*2)+(1*7)=125
125 % 10 = 5
So 1112937-27-5 is a valid CAS Registry Number.

1112937-27-5Relevant articles and documents

PROCESS FOR PREPARING VORICONAZOLE

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Page/Page column 10-11, (2009/04/25)

Optically pure voriconazole can be prepared in a high yield by a) subjecting 1-(2,4-difluorophenyl)-2(1H-1,2,4-triazol-1-yl)ethanone to Reformatsky-type coupling reaction with a substituted thiopyrimidine derivative to obtain a desired (2R,3S)/(2S,3R)-enantiomeric pair; b) removing the thiol derivative from the enantiomer to obtain racemic voriconazole; and c) isolating the racemic voriconazole by way of optical resolution using an optically active acid.

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