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340157-81-5

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340157-81-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 340157-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,0,1,5 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 340157-81:
(8*3)+(7*4)+(6*0)+(5*1)+(4*5)+(3*7)+(2*8)+(1*1)=115
115 % 10 = 5
So 340157-81-5 is a valid CAS Registry Number.

340157-81-5Downstream Products

340157-81-5Relevant articles and documents

Efficient access to perfluoroalkylated aryl compounds by Heck reaction

Darses, Sylvain,Pucheault, Mathieu,Genet, Jean-Pierre

, p. 1121 - 1128 (2007/10/03)

Efficient introduction of perfluorinated tails onto aromatic rings has been achieved by Heck reaction between perfluoroalkenes and arenediazonium salts, catalysed by palladium acetate. Subsequent transition metal catalysed hydrogenation of the double bond afforded a large variety of aromatic compounds bearing an affinity for fluorous solvents. Formation of perfluoroalkylated phosphane ligands and their use in palladium-catalysed coupling between potassium trifluoro(vinyl)borates and diazonium salts is also described, allowing an easy separation and recycling of the catalytic system.

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