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20258-22-4

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20258-22-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20258-22-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,5 and 8 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20258-22:
(7*2)+(6*0)+(5*2)+(4*5)+(3*8)+(2*2)+(1*2)=74
74 % 10 = 4
So 20258-22-4 is a valid CAS Registry Number.

20258-22-4Upstream product

20258-22-4Relevant academic research and scientific papers

TiCl4-Catalyzed Addition of HN3 to Aldehydes and Ketones. Thermolysis and Photolysis of α-Azido Ethers

Hassner, Alfred,Fibiger, Richard,Amarasekara, Ananda S.

, p. 22 - 27 (2007/10/02)

Aldehydes react with hydrazoic acid and alcohols in the presence of catalytic amounts of TiCl4 to produce α-azido ethers.The conversion of simple ketones to methyl α-azido alkyl ethers can be accomplished by means of hydrazoic acid and methyl orthoformate.Both gas-phase thermolysis and photolysis of representative α-azido ethers were studied and shown to produce mainly imino ethers.In the thermolysis, migratory preference decreases in the series H >> CH3 > Ph >> OR.

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