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43169-91-1

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43169-91-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 43169-91-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,3,1,6 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 43169-91:
(7*4)+(6*3)+(5*1)+(4*6)+(3*9)+(2*9)+(1*1)=121
121 % 10 = 1
So 43169-91-1 is a valid CAS Registry Number.

43169-91-1Downstream Products

43169-91-1Relevant articles and documents

Homolytic Substitution at Selenium: Ring Closure of ω-(Benzylseleno)alkyl Radicals

Benjamin, Lynda J.,Schiesser, Carl H.,Sutej, Katarina

, p. 2557 - 2566 (2007/10/02)

The ring closure of a series of ω-(benzylseleno)alkyl radicals (1) has been studied.Thiohydroxamic esters derived from ω-(benzylseleno)alkanoic acids decompose smoothly, upon irradiation, with the loss of carbon dioxide to afford 5- and 6- membered selenium-containing rings in 78-95 percent yield.The thiohydroxamic ester derived from 7-(benzylseleno)heptanoic acid affords the 7-membered heterocycle, selenopane in approximately 50 percent yield.These reactions presumably involve intramolecular free radical homolytic substitution at selenium and appear to proceed readily for both primary and secondary carbon-centered radicals.The 5-(benzylseleno)hex-2-yl radical (1f) appears to ring close without stereoselectivity, to give a 1:1 mixture of cis- and trans-2,4-dimethyltetrahydroselenophene, a finding in keeping with molecular mechanics (MM2) calculations. Key Words: Homolytic Substitution; Selenium; Radical Ring Closure; Stereoselectivity; Thiohydroxamic Ester

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