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20579-79-7

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20579-79-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20579-79-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,7 and 9 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 20579-79:
(7*2)+(6*0)+(5*5)+(4*7)+(3*9)+(2*7)+(1*9)=117
117 % 10 = 7
So 20579-79-7 is a valid CAS Registry Number.

20579-79-7Relevant articles and documents

Toward poly(aminophthalimide), structures of dimers and trimers

Katayama, Hiroyuki,de Greef, Tom F.A.,Kooijman, Huub,Spek, Anthony L.,Vekemans, Jef A.J.M.,Meijer

, p. 6642 - 6653 (2008/02/05)

Poly(aminophthalimide) (PAP) dimers and trimers have been synthesized by palladium-catalyzed cross-coupling reactions of 3-aminophthalimides with 3-chloro- and 3,6-dichlorophthalimide, respectively. When Pd(OAc)2, XPhos (2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl), and K3PO4 are used, the C-N bond-forming reactions proceed quantitatively. The structures of those oligomers are examined by experimental and theoretical techniques including NMR, IR, single-crystal X-ray diffraction, and DFT calculations. The strong preference for cisoid structure of the diphthalimidylamine unit bearing a bifurcate hydrogen bonding is disclosed. Therefore, the aminophthalimide backbone is a highly promising candidate for the construction of a dynamically ordered helical structure.

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