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449729-48-0

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449729-48-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 449729-48-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,9,7,2 and 9 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 449729-48:
(8*4)+(7*4)+(6*9)+(5*7)+(4*2)+(3*9)+(2*4)+(1*8)=200
200 % 10 = 0
So 449729-48-0 is a valid CAS Registry Number.

449729-48-0Relevant articles and documents

A highly stereocontrolled total synthesis of (+)-biotin from L-cysteine

Seki, Masahiko,Hatsuda, Masanori,Mori, Yoshikazu,Yamada, Shin-Ichi

, p. 3269 - 3272 (2007/10/03)

(+)-Biotin was synthesized in 11 steps and in 25% overall yield from readily accessible L-cysteine through a Lewis base-catalyzed highly diastereoselective cyanosilylation of (2R,4R)-N-Boc-2-phenylthiazolidine-4-carbaldehyde 2 and a ring closure of a cis-allylic carbonate 5b utilizing a palladium-catalyzed intramolecular allylic amination.

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