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197958-49-9

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197958-49-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197958-49-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,9,5 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 197958-49:
(8*1)+(7*9)+(6*7)+(5*9)+(4*5)+(3*8)+(2*4)+(1*9)=219
219 % 10 = 9
So 197958-49-9 is a valid CAS Registry Number.

197958-49-9Relevant articles and documents

Facile amine formation by intermolecular catalytic amidation of carbon-hydrogen bonds

Fructos, Manuel R.,Trofimenko, Swiatoslaw,Mar Diaz-Requejo,Perez, Pedro J.

, p. 11784 - 11791 (2007/10/03)

A simple copper-based catalytic system has been developed for the carbon-hydrogen amidation reaction. The copper-homoscorpionate complex Tp Br3Cu(NCMe) catalyzes the transfer of the nitrene unit NTs (Ts = p-toluenesulfonyl) and its subsequent insertion into the sp3 C-H bonds of alkyl aromatic and cyclic ethers or the sp2 C-H bonds of benzene using PhI=NTs as the nitrene source, affording the corresponding trisubstitued NR1HTs amines in moderate to high yields. The use of the environmentally friendly chloramine-T has also proven effective, with the advantage that sodium chloride is formed as the only byproduct. A tandem, one-pot consecutive nitrene-carbene insertion system has been developed to yield amino acid derivatives.

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