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81805-44-9

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81805-44-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81805-44-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,0 and 5 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81805-44:
(7*8)+(6*1)+(5*8)+(4*0)+(3*5)+(2*4)+(1*4)=129
129 % 10 = 9
So 81805-44-9 is a valid CAS Registry Number.

81805-44-9Relevant articles and documents

Intramolecular Diels-Alder Additions of Benzynes to Furans. Application to the Total Synthesis of Biflorin, and the Mansonones E, I, and F

Best, Wayne M.,Wege, Dieter

, p. 647 - 666 (2007/10/02)

Benzynes, generated either by the debromination of an appropriately substituted o-dibromobenzene, or by the thermolysis of a substituted diazotized anthranilic acid, have been trapped intramolecularly by an attached furan moiety.One such adduct (41) has b

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