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620598-74-5

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620598-74-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 620598-74-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,2,0,5,9 and 8 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 620598-74:
(8*6)+(7*2)+(6*0)+(5*5)+(4*9)+(3*8)+(2*7)+(1*4)=165
165 % 10 = 5
So 620598-74-5 is a valid CAS Registry Number.

620598-74-5Relevant articles and documents

Highly stereoselective Friedel-Crafts type cyclization. Facile access to enantiopure 1,4-dihydro-4-phenyl isoquinolinones

Philippe, Nicolas,Denivet, Fran?ois,Vasse, Jean-Luc,Sopkova-De Olivera Santos, Jana,Levacher, Vincent,Dupas, Georges

, p. 8049 - 8056 (2007/10/03)

The present report describes a stereoselective synthesis of 1,4-dihydro-4-phenyl isoquinolinones 5 based on a stereoselective Friedel-Crafts type cyclization. Cyclization precursors 1 were prepared in two steps, from the readily available (S)-mandelic acid, in 60-80% overall yield. The stereoselective electrophilic cyclization was accomplished in 20-86% yield and with 20-97% ee. In the course of this work, the presence of the amide carbonyl was found to be particularly important to guarantee a stereospecific process during the electrophilic aromatic substitution.

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