Cas 21990-28-3,3-(Diphenyl-phosphinoyl)-3,N-diphenyl-propionamide

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Check Digit Verification of cas no

The CAS Registry Mumber 21990-28-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,9 and 0 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 21990-28:
(7*2)+(6*1)+(5*9)+(4*9)+(3*0)+(2*2)+(1*8)=113
113 % 10 = 3
So 21990-28-3 is a valid CAS Registry Number.

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21990-28-3Relevant academic research and scientific papers

Synthesis of new phosphonoamide and phosphonocaprolactam derivatives via the diethyl chlorophosphate-promoted beckmann rearrangement of γ-phosphonyloximes

Wahbi, Aymen,Touil, Soufiane

, p. 397 - 404 (2015)

ABSTRACT: Herein, we report an efficient and straightforward synthesis of new phosphonoamide and phosphonocaprolactam derivatives, via the Beckmann rearrangement of γ-phosphonyloximes. The reaction proceeded smoothly in the presence of diethyl chlorophosp

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