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131294-12-7

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131294-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131294-12-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,2,9 and 4 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 131294-12:
(8*1)+(7*3)+(6*1)+(5*2)+(4*9)+(3*4)+(2*1)+(1*2)=97
97 % 10 = 7
So 131294-12-7 is a valid CAS Registry Number.

131294-12-7Relevant articles and documents

Magnesium-catalyzed asymmetric direct aldol addition of ethyl diazoacetate to aromatic, aliphatic, and α,β-unsaturated aldehydes

Trost, Barry M.,Malhotra, Sushant,Fried, Benjamin A.

supporting information; experimental part, p. 1674 - 1675 (2009/07/25)

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Inter- and intramolecular Mitsunobu reaction based approaches to 2-substituted chromans and chroman-4-ones

Hodgetts, Kevin J.

, p. 6860 - 6870 (2007/10/03)

Two approaches to optically active 2-substituted chromans and chroman-4-ones are described. The first utilized an intermolecular Mitsunobu reaction of a homochiral halopropanol and 2-bromophenol followed by cyclization to the 2-substituted chroman. In addition, a double lithiation procedure was developed to introduce additional functionality to the chroman. The second approach utilized an intramolecular Mitsunobu cyclization to give the 2-substituted chroman-4-one nucleus. The methodologies were applied to the syntheses of several biologically active natural and synthetic products.

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