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201673-58-7

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201673-58-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 201673-58-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,6,7 and 3 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 201673-58:
(8*2)+(7*0)+(6*1)+(5*6)+(4*7)+(3*3)+(2*5)+(1*8)=107
107 % 10 = 7
So 201673-58-7 is a valid CAS Registry Number.

201673-58-7Downstream Products

201673-58-7Relevant articles and documents

Novel synthesis of tetrahydro-2(1H)-quinolones using Diels-Alder reactions of 1-arylsulfonyl-2(1H)-pyridones having an electron-withdrawing group

Fujita, Reiko,Watanabe, Kazuhiro,Ikeura, Wakako,Ohtake, Yohsuke,Hongo, Hiroshi,Harigaya, Yosihiro,Matsuzaki, Hisao

, p. 8841 - 8850 (2007/10/03)

A novel synthetic methodology of preparing tetrahydro-2(1H)-quinolones by Diels-Alder reactions between 2-methyl- and 2,3-dimethyl-1,3-butadienes and 1-arylsulfonyl-2(1H)-pyridones having an electron-withdrawing group at the 5-position is presented. Furthermore, the site-selectivity analyses based on MO calculations of the 5-substituted 2(1H)-pyridones acting as the dienophiles are described.

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