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20331-32-2

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20331-32-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20331-32-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,3,3 and 1 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20331-32:
(7*2)+(6*0)+(5*3)+(4*3)+(3*1)+(2*3)+(1*2)=52
52 % 10 = 2
So 20331-32-2 is a valid CAS Registry Number.

20331-32-2Relevant articles and documents

Radical Beckmann Rearrangement and Its Application in the Formal Total Synthesis of Antimalarial Natural Product Isocryptolepine via C-H Activation

Mahajan, Pankaj S.,Humne, Vivek T.,Tanpure, Subhash D.,Mhaske, Santosh B.

, p. 3450 - 3453 (2016)

The Beckmann rearrangement of ketoximes, mediated by ammonium persulfate-dimethyl sulfoxide as a reagent, has been achieved under neutral conditions. Based on the radical trapping and 18O-labeling experiments, the transformation follows a mechanism involving a radical pathway. The scope and generality of the developed protocol has been demonstrated by 19 examples. The developed protocol and Pd-catalyzed intramolecular double C-H activation were used as key steps in the formal total synthesis of antimalarial natural product isocryptolepine.

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