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21397-40-0

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21397-40-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21397-40-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,3,9 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21397-40:
(7*2)+(6*1)+(5*3)+(4*9)+(3*7)+(2*4)+(1*0)=100
100 % 10 = 0
So 21397-40-0 is a valid CAS Registry Number.

21397-40-0Relevant articles and documents

Efficient synthesis of tertiary acyclic amides by the Chapman rearrangement of aryl benzimidates in ionic liquids

Epishina, Margarita A.,Kulikov, Alexander S.,Ignat'Ev, Nikolai V.,Schulte, Michael,Makhova, Nina N.

, p. 126 - 128 (2015)

The Chapman rearrangement of aryl N-arylbenzimidates to tertiary acyclic amides is accelerated in ionic liquids and proceeds at lower temperatures as 120-190°C.

A simple copper-catalyzed synthesis of tertiary acyclic amides

Racine, Emilie,Monnier, Florian,Vors, Jean-Pierre,Taillefer, Marc

supporting information; experimental part, p. 2818 - 2821 (2011/07/09)

The N-arylation of aromatic and aliphatic secondary acyclic amides, known to be poor nucleophiles, has been accomplished using a simple and cheap copper catalytic system. The corresponding tertiary acyclic amides, which can be found in numerous biologically active compounds, have been obtained in good to excellent yields.

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