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452083-37-3

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452083-37-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 452083-37-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,5,2,0,8 and 3 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 452083-37:
(8*4)+(7*5)+(6*2)+(5*0)+(4*8)+(3*3)+(2*3)+(1*7)=133
133 % 10 = 3
So 452083-37-3 is a valid CAS Registry Number.

452083-37-3Relevant articles and documents

Atropo-enantioselective total synthesis of knipholone and related antiplasmodial phenylanthraquinones

Bringmann, Gerhard,Menche, Dirk,Kraus, Juergen,Muehlbacher, Joerg,Peters, Karl,Peters, Eva-Maria,Brun, Reto,Bezabih, Merhatibeb,Abegaz, Berhanu M.

, p. 5595 - 5610 (2007/10/03)

The "lactone concept" has been efficiently employed for the first atropo-enantioselective synthesis of knipholone and related natural phenylanthraquinones. Besides the regio- and stereoselective construction of the biaryl axis, another important step was the "synthetically late" introduction of the C-acetyl group, either by a Friedel-Crafts type acetylation or by an ortho-selective Fries rearrangement first tested on simplified model systems and subsequently applied to the highly atroposelective preparation of the natural products and of simplified analogs thereof for biotesting. The synthetic availability of these natural biaryls, their precursors, and their unnatural analogs permitted a broader investigation of the antiplasmodial activities of these interesting biaryls.

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