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21151-64-4

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21151-64-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21151-64-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,5 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21151-64:
(7*2)+(6*1)+(5*1)+(4*5)+(3*1)+(2*6)+(1*4)=64
64 % 10 = 4
So 21151-64-4 is a valid CAS Registry Number.

21151-64-4Relevant articles and documents

Selectfluor-mediated oxidative methylenation of amide with N, N -dimethylpropanamide for N, N ′-methylenebisamide synthesis

Cao, Yue,Zhou, Dongheng,Ma, Yongmin

, p. 37 - 41 (2019/01/10)

A simple and efficient approach for the synthesis of N,N′-methylenebisamides through a Selectfluor-mediated oxidative reaction of aromatic amides and N,N-dimethylpropanamide (DMP) is described. Remarkable results clearly reveal that DMP plays a dual role in this reaction, as both a one-carbon source and an environment-friendly solvent. Moreover, the process provides new strategies for the synthesis of bisamides with advantages of operationally simple, insensitive to atmospheric conditions, and good to high yields.

STUDIES ON THE SYNTHESIS OF BENZOLACTAM RINGS. II SYNTHESIS OF 1,4-DIHYDRO-3(2H)-ISOQUINOLINONE DERIVATIVES

Kamochi, Yasuko,Watanabe, Yasuo

, p. 2385 - 2391 (2007/10/02)

A new synthesis of 1,4-dihydro-3(2H)-isoquinolinones by the amidomethylation with acrylacetamide or acrylacetonitrile and paraformaldehyde in some acid-catalysts is described.

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