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343846-36-6

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343846-36-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 343846-36-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,3,8,4 and 6 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 343846-36:
(8*3)+(7*4)+(6*3)+(5*8)+(4*4)+(3*6)+(2*3)+(1*6)=156
156 % 10 = 6
So 343846-36-6 is a valid CAS Registry Number.

343846-36-6Relevant articles and documents

An efficient method of synthesizing optically pure N-Boc-4-bromo-N-methyl-1-tosyl-D-tryptophan methyl ester, a key intermediate in the synthesis of optically active ergot alkaloids

Yokoyama, Yuusaku,Osanai, Kumi,Mitsuhashi, Masaharu,Kondo, Kazuhiro,Murakami, Yasuoki

, p. 653 - 659 (2001)

Optically pure N-Boc-4-bromo-N-methyl-1-tosyl-D-tryptophan methyl ester (D-4), a key intermediate in the synthesis of optically active ergot alkaloids such as chanoclavine-I (7) and costaclavine (8), was prepared from N-acetyl-4-bromo-D-tryptophan (D-11) obtained from 4-bromoindole (9) and DL-serine (10) in two steps.

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