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20494-51-3

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20494-51-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20494-51-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,9 and 4 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20494-51:
(7*2)+(6*0)+(5*4)+(4*9)+(3*4)+(2*5)+(1*1)=93
93 % 10 = 3
So 20494-51-3 is a valid CAS Registry Number.

20494-51-3Downstream Products

20494-51-3Relevant articles and documents

Metal-Free Hydrosilylation of Ketenes with Silicon Electrophiles: Access to Fully Substituted Aldehyde-Derived Silyl Enol Ethers

Roy, Avijit,Oestreich, Martin

supporting information, p. 8273 - 8276 (2021/05/11)

Little-explored hydrosilylation of ketenes promoted by main-group catalysts is reported. The boron Lewis acid tris(pentafluorophenyl)borane accelerates the slow uncatalyzed reaction of ketenes and hydrosilanes, thereby providing a convenient access to the new class of β,β-di- and β-monoaryl-substituted aldehyde-derived silyl enol ethers. Yields are moderate to high, and Z configuration is preferred. The corresponding silyl bis-enol ethers are also available when using dihydrosilanes. The related trityl-cation-initiated hydrosilylation involving self-regeneration of silylium ions is far less effective.

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