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431-44-7

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431-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 431-44-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,3 and 1 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 431-44:
(5*4)+(4*3)+(3*1)+(2*4)+(1*4)=47
47 % 10 = 7
So 431-44-7 is a valid CAS Registry Number.

431-44-7Upstream product

431-44-7Relevant articles and documents

Zinc(0)-Copper(I) Chloride Promoted Reaction of Methyl Dichlorofluoroacetate with Carbonyl Compounds. A New Efficient Method for the Synthesis of Methyl (Z)-α-Fluoro-α,β-unsaturated Carboxylates

Ishihara, Takashi,Kuroboshi, Manabu

, p. 1145 - 1148 (2007/10/02)

Methyl dichlorofluoroacetate, easily prepared from methyl trichloroacetate and antimony(III) fluoride, underwent the reductive coupling-elimination raection with carbonyl compounds in the presence of zinc(0), a catalytic amount of copper(I) chloride, acetic anhydride, and molecular sieves to give the corresponding (Z)-α-fluoro-α,β-unsaturated carboxylic acid methyl esters in high yields.

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