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688797-81-1

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688797-81-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 688797-81-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,8,7,9 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 688797-81:
(8*6)+(7*8)+(6*8)+(5*7)+(4*9)+(3*7)+(2*8)+(1*1)=261
261 % 10 = 1
So 688797-81-1 is a valid CAS Registry Number.

688797-81-1Relevant articles and documents

Synthesis of the novel conjugated ω,ω′-diaryl/heteroaryl hexatriene system with the central double bond in a heteroaromatic ring: photochemical transformations of 2,3-divinylfuran derivatives

?kori?, Irena,Flegar, Ivana,Marini?, ?eljko,?indler-Kulyk, Marija

, p. 7396 - 7407 (2006)

New β,β′-aryl/heteroaryl 2,3-divinylfuran derivatives (9a-d) in which a hexatriene system is a part of heteroaromatic ring have been synthesized and their photochemical properties were investigated. The primary process observed was the isomerization to trans,trans-isomers 9a-d followed by photochemical rearrangement of the furan ring giving the phototransposition products (I-IV). Stilbenes (20, 21) and phenanthrenes (22, 25, and 26), formed as secondary products from the competitive intermolecular cycloadditions, were also observed.

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