Cas 83125-03-5,2-Ethoxy-3-trichloracetyltetrahydrofuran

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Check Digit Verification of cas no

The CAS Registry Mumber 83125-03-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,1,2 and 5 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 83125-03:
(7*8)+(6*3)+(5*1)+(4*2)+(3*5)+(2*0)+(1*3)=105
105 % 10 = 5
So 83125-03-5 is a valid CAS Registry Number.

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83125-03-5Relevant articles and documents

Enol Ethers, VIII. Acylation of Enol Ethers with Reactive Carbonyl Chlorides

Effenberger, Franz,Maier, Roland,Schoenwaelder, Karl-Heinz,Ziegler, Thomas

, p. 2766 - 2782 (2007/10/02)

Enol ethers 2 are acylated under mild conditions with activated acyl chlorides, e. g. chloroacetyl chlorides 1a, b, cyanoacetyl chloride (6c), and malonic acid chlorides 6a, b in good yields.The products formed and the yield depend on the acylation potential of the acyl chlorides.The potential β-keto aldehydes 4, 5, and 1,3,5-tricarbonyl compounds 8 obtained are valuable intermediates for heterocyclic synthesis.

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83125-03-5