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31246-34-1

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31246-34-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31246-34-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,2,4 and 6 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 31246-34:
(7*3)+(6*1)+(5*2)+(4*4)+(3*6)+(2*3)+(1*4)=81
81 % 10 = 1
So 31246-34-1 is a valid CAS Registry Number.

31246-34-1Relevant articles and documents

Enol Ethers, XIV. Acylation of Keto Enol Ethers with Malonyl Dichloride - A New Synthesis of Phloroglucinols

Effenberger, Franz,Schoenwaelder, Karl-Heinz

, p. 3270 - 3279 (2007/10/02)

Phloroglucinols 4 and/or 4-hydroxy-2H-pyran-2-ones 5 are formed from keto enol ethers 1 and malonyl dichloride (2a) in high yields.Since the pyranones 5 can be smoothly converted into phloroglucinols, the reaction of 1 with 2a represents a new, facile synthetic route to phloroglucinols.The reaction proceeds via formation of a chloro carbonyl ketene 8 and its subsequent reaction with 1.The product ratio 4:5 is rationalized in terms of substituent effects in the enol ether substrate.

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