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1276113-56-4

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1276113-56-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1276113-56-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,7,6,1,1 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1276113-56:
(9*1)+(8*2)+(7*7)+(6*6)+(5*1)+(4*1)+(3*3)+(2*5)+(1*6)=144
144 % 10 = 4
So 1276113-56-4 is a valid CAS Registry Number.

1276113-56-4Relevant articles and documents

SITAGLIPTIN INTERMEDIATES, PREPARATION METHODS AND USES THEREOF

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Page/Page column 6, (2012/07/27)

The present invention relates to Sitagliptin intermediate and preparation method and use thereof. The method comprises reacting compound of formula (II) and trifluorobromobenzene with a Grignard reagent by a Grignard reaction to obtain a compound of formula (I). Compound of formula (I) is a new intermediate compound for the synthesis of Sitagliptin. Compound of formula (I) can be easily used for preparing another important intermediate compound of formula (V) for the synthesis of Sitagliptin. The structures of the compounds mentioned above are as the following:

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