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133391-56-7

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133391-56-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133391-56-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,3,9 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 133391-56:
(8*1)+(7*3)+(6*3)+(5*3)+(4*9)+(3*1)+(2*5)+(1*6)=117
117 % 10 = 7
So 133391-56-7 is a valid CAS Registry Number.

133391-56-7Downstream Products

133391-56-7Relevant articles and documents

THE TRIFLUOROMETHYLATION OF CHLOROAROMATICS USING THE COPPER-CF2Br2-DIALKYLAMIDE REACTION SYSTEM

Clark, James H.,Denness, James E.,McClinton, Martin A.,Wynd, Andrew J.

, p. 411 - 426 (2007/10/02)

The in situ generation of CuCF3 from the reaction of copper, dibromodifluoromethane and either N,N-dimethylformamide or N,N-dimethylacetamide (Burton's reagent) has been used for the direct substitution of chlorine by CF3 in a number of aromatic substrates.Particular attention has been paid to the effects of ring substituents on the efficiency of reaction.

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