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117417-05-7

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117417-05-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117417-05-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,4,1 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 117417-05:
(8*1)+(7*1)+(6*7)+(5*4)+(4*1)+(3*7)+(2*0)+(1*5)=107
107 % 10 = 7
So 117417-05-7 is a valid CAS Registry Number.

117417-05-7Relevant articles and documents

Regio- and stereoselective synthesis of bromoalkenes by homolytic hydrobromination of alkynes with hydrogen bromide

Kinoshita, Hidenori,Kumaki, Wataru,Miura, Katsukiyo

, (2022/03/07)

Homolytic hydrobromination of terminal and internal alkynes with a commercially available solution of hydrogen bromide in acetic acid has been investigated for regio- and stereoselective synthesis of bromoalkenes. Under an aerobic atmosphere at room temperature, the reaction of ethynylarenes with a small excess of HBr efficiently gave (2-bromoethenyl)arenes with good to high E-selectivity. (Alk-1-ynyl)arenes, or internal alkynes bearing both phenyl and alkyl groups at the sp-carbons also underwent the air-initiated hydrobromination to exhibit high Z-selectivity under kinetic conditions using a half equivalent of HBr.

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