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89489-28-1

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89489-28-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89489-28-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,4,8 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 89489-28:
(7*8)+(6*9)+(5*4)+(4*8)+(3*9)+(2*2)+(1*8)=201
201 % 10 = 1
So 89489-28-1 is a valid CAS Registry Number.

89489-28-1Relevant articles and documents

The ketene-surrogate coupling: Catalytic conversion of aryl iodides into aryl ketenes through ynol ethers

Zhang, Wenhan,Ready, Joseph M.

supporting information, p. 8980 - 8984 (2014/11/07)

tert-Butoxyacetylene is shown to undergo Sonogashira coupling with aryl iodides to yield aryl-substituted tert-butyl ynol ethers. These intermediates participate in a [1,5]-hydride shift, which results in the extrusion of isobutylene and the generation of aryl ketenes. The ketenes are trapped in situ with multiple nucleophiles or undergo electrocyclic ring closure to yield hydroxynaphthalenes and quinolines.

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