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83818-44-4

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83818-44-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83818-44-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,8,1 and 8 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 83818-44:
(7*8)+(6*3)+(5*8)+(4*1)+(3*8)+(2*4)+(1*4)=154
154 % 10 = 4
So 83818-44-4 is a valid CAS Registry Number.

83818-44-4Relevant articles and documents

cis-1,2-Bis(phenylsulfonyl)ethylene: a Novel, Convenient Acetylene Synthon in Diels-Alder Reactions

Lucchi, Ottorino De,Modena, Giorgio

, p. 914 - 915 (1982)

cis-1,2-Bis(phenylsulfonyl)ethylene (5) is found to be a reactive acetylene synthon in Diels-Alder reactions since, after cycloaddition to cyclopentadiene, cyclohexadiene, and cycloheptatriene, and reduction with sodium amalgam, the corresponding bicyclodienes (6)-(8) are obtained in good yields.

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