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18681-53-3

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18681-53-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18681-53-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,6,8 and 1 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 18681-53:
(7*1)+(6*8)+(5*6)+(4*8)+(3*1)+(2*5)+(1*3)=133
133 % 10 = 3
So 18681-53-3 is a valid CAS Registry Number.

18681-53-3Relevant articles and documents

Fluoromethyl-2,4,6-trinitrophenylsulfonate: A New Electrophilic Monofluoromethylating Reagent

Reichel, Marco,Sile, Sami,Kornath, Andreas,Karaghiosoff, Konstantin

, p. 4423 - 4431 (2021)

Fluoromethyl-2,4,6-trinitrophenylsulfonate has been prepared for the first time and qualified as a simple to use monofluoromethylating reagent. Its molecular structure in the solid state has been determined by single-crystal X-ray diffraction studies. This reagent proves to be effective for the electrophilic introduction of a CH2F group into selected chalcogen and nitrogen nucleophiles. Monofluoromethyl derivatives of various bifunctional N,O-nucleophiles have been synthesized using fluoromethyl-2,4,6-trinitrophenylsulfonate. Due to the good crystallizing properties of the anion, the fluoromethylated products as well as side products that are difficult to identify by nuclear magnetic resonance spectroscopy can readily be characterized by X-ray crystallographic techniques.

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