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131556-39-3

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131556-39-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131556-39-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,5,5 and 6 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 131556-39:
(8*1)+(7*3)+(6*1)+(5*5)+(4*5)+(3*6)+(2*3)+(1*9)=113
113 % 10 = 3
So 131556-39-3 is a valid CAS Registry Number.

131556-39-3Relevant articles and documents

Chiral toluene-2,α-sultam auxiliaries: Asymmetric Diels-Alder reactions of N-enoyl derivatives

Oppolzer, Wolfgang,Wills, Martin,Kelly, Martha J.,Signer, Marcel,Blagg, Julian

, p. 5015 - 5018 (2007/10/02)

Asymmetric, RmAlCln mediated Diels-Alder reactions of 1,3-dienes to N-enoyl derivatives 4 and 9 of (R)-methyl-, (R,S)-t-butyl-, α,α-dimethylbenzyl-, benzyl and (S)-methyl-toluene-2,α-sultams 3 as well as to N-enoyl derivatives 15 of (R)-2,3-dihydro-3-methylisoindolinone 14 are described.

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