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77821-53-5

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77821-53-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77821-53-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,2 and 1 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 77821-53:
(7*7)+(6*7)+(5*8)+(4*2)+(3*1)+(2*5)+(1*3)=155
155 % 10 = 5
So 77821-53-5 is a valid CAS Registry Number.

77821-53-5Relevant articles and documents

Direct electrophilic α-fluorination of imines: Efficient synthesis of mono-and difluoroimines

Verniest, Guido,Van Hende, Eva,Surmont, Riccardo,De Kimpe, Norbert

, p. 4767 - 4770 (2006)

(Chemical Equation Presented) A mild and efficient procedure to synthesize α-fluoro- and α,α-difluoroimines was developed. Various N-alkylimines derived from acetophenones were successfully monofluorinated using NFSI (N-fluorobenzenesulfonimide) in a mixture of CH3CN and DMF at 0°C. Alternatively, the same procedure without DMF gave rise to difluorinated imines when performed at room temperature. The obtained α- and α,α-difluorinated imines were subsequently reduced to give the corresponding β-fluoro- and β,β-difluoroamines in good yield.

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