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28111-76-4

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28111-76-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28111-76-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,1,1 and 1 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 28111-76:
(7*2)+(6*8)+(5*1)+(4*1)+(3*1)+(2*7)+(1*6)=94
94 % 10 = 4
So 28111-76-4 is a valid CAS Registry Number.

28111-76-4Relevant articles and documents

REACTION OF N-ARYLSULFONYL-2-ARENESULFONAMIDO-1,4-BENZOQUINONE 4-IMINES WITH AROMATIC AMINES

Avdeenko, A. P.,Evgrafova, N. I.,Tolmachev, A. A.,Polyakov, A. E.

, p. 1516 - 1521 (2007/10/02)

The reaction of N-arylsulfonyl-2-arenesulfonamido-1,4-benzoquinone 4-imines with aromatic amines leads to N-aryl-2-arenesulfonamido-5-arylamino-1,4-benzoquinone 4-imines.Their structures were proved by alternative syntheses and also by the data from PMR and IR spectroscopy and mass spectrometry.

QUINONE IMINES AND QUINONOID MACROCYCLES. XVI. N,N'-BIS(4-BENZENESULFONYLIMIDO-2-QUINONYL)DIAMIDE DERIVATIVES OF HYDROCARBONS

Gustinya, D. V.,Markava, E. Ya.,Liepin'sh, E. E.,Freimanis, Ya. F.

, p. 129 - 134 (2007/10/02)

A series of N,N'-bis(4-benzenesulfonylimido-2-quinonyl)diamide derivatives were synthesized.On the basis of an analysis of the electronic absorption spectra and 1H NMR spectra and the 1J (15N-1H) spin-spin coupling constants of the model compounds and of

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