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1425924-22-6

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1425924-22-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1425924-22-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,5,9,2 and 4 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1425924-22:
(9*1)+(8*4)+(7*2)+(6*5)+(5*9)+(4*2)+(3*4)+(2*2)+(1*2)=156
156 % 10 = 6
So 1425924-22-6 is a valid CAS Registry Number.

1425924-22-6Relevant articles and documents

Synthesis of the tripeptide domain of sanglifehrins using asymmetric phase-transfer catalysis

White, James D.,Suttisintong, Khomson

, p. 2757 - 2762 (2013/04/23)

The tripeptide (S)-valinyl-(S)-m-hydroxyphenylalanyl-(3S)-piperazate common to immunosuppressant sanglifehrins was synthesized from the constituent amino acid residues in nine steps and 42% overall yield. A key construction was the installation of (S) absolute configuration in m-hydroxyphenylalanine using asymmetric phase-transfer catalysis in the presence of N-(1-naphthyl) cinchonidinium bromide. Cbz-protected (S)-valine was first coupled to the amino group of (S)-m-triisopropylsilyloxyphenylalanine tert-butyl ester, and the resulting dipeptide after ester cleavage was linked to (3S)-methyl piperazate.

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