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207789-64-8

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207789-64-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 207789-64-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,7,7,8 and 9 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 207789-64:
(8*2)+(7*0)+(6*7)+(5*7)+(4*8)+(3*9)+(2*6)+(1*4)=168
168 % 10 = 8
So 207789-64-8 is a valid CAS Registry Number.

207789-64-8Relevant articles and documents

Towards a new type of aromatic diynes activation : Synthesis of a novel bicyclic enediyne

Raeppel, Stéphane,Toussaint, Dominique,Suffert, Jean

, p. 537 - 539 (2007/10/03)

The aromatic acyclic diynes 2 and 3 have been synthesised in order to test the feasibility of a new activation towards their cyclisation. In addition, a difference of stability between 13 and 20 during the Nozaki-Kishi cyclisation reaction occurs when the aromatic ring possesses or not an intramolecular trigger device. Thus, the aromatic bicyclic enediyne 14 is stable while 21 has not been isolated.

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