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221880-25-7

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221880-25-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221880-25-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,8,8 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 221880-25:
(8*2)+(7*2)+(6*1)+(5*8)+(4*8)+(3*0)+(2*2)+(1*5)=117
117 % 10 = 7
So 221880-25-7 is a valid CAS Registry Number.

221880-25-7Downstream Products

221880-25-7Relevant articles and documents

Heterocyclic enaminones: Photochemical synthesis of 6,7,8,9-tetrahydro- 5H-pyrido[2,3-b]indol-9-ones

Blache, Yves,Sinibaldi-Troin, Marie-Eve,Hichour, Mohammed,Benezech, Veronique,Chavignon, Olivier,Gramain, Jean-Claude,Teulade, Jean-Claude,Chapat, Jean-Pierre

, p. 1959 - 1970 (1999)

The synthesis of 6,7,8,9-tetrahydro-5H-pyrido[2,3-h]indol-9-ones from arylenaminones is described. Two 'routes' have been investigated: a radical process through a photochemical reaction, and a catalytic process through an arylpalladium complex.

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