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97023-51-3

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97023-51-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97023-51-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,0,2 and 3 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 97023-51:
(7*9)+(6*7)+(5*0)+(4*2)+(3*3)+(2*5)+(1*1)=133
133 % 10 = 3
So 97023-51-3 is a valid CAS Registry Number.

97023-51-3Downstream Products

97023-51-3Relevant articles and documents

Tandem carbocupration/oxygenation of terminal alkynes

Zhang, Donghui,Ready, Joseph M.

, p. 5681 - 5683 (2007/10/03)

(Chemical Equation Presented) A direct and general synthesis of α-branched aldehydes and their enol derivatives is described. Carbocupration of terminal alkynes and subsequent oxygenation with lithium tert-butyl peroxide generates a metallo-enolate. Trapping with various electrophiles provides α-branched aldehydes or stereo-defined trisubstituted enol esters or silyl ethers. The tandem carbocupration/ oxygenation tolerates alkyl and silyl ethers, esters, and tertiary amines. The reaction is effective with organocopper complexes derived from primary, secondary, and tertiary Grignard reagents and from n-butyllithium.

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