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457-46-5

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457-46-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 457-46-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,5 and 7 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 457-46:
(5*4)+(4*5)+(3*7)+(2*4)+(1*6)=75
75 % 10 = 5
So 457-46-5 is a valid CAS Registry Number.

457-46-5Downstream Products

457-46-5Relevant articles and documents

Unbalanced-Ion-Pair-Catalyzed Nucleophilic Fluorination Using Potassium Fluoride

Hammond, Gerald B.,Li, Wangbing,Lu, Zhichao,Xu, Bo

, p. 9640 - 9644 (2021/12/14)

An unbalanced ion pair promoter (e.g., tetrabutylammonium sulfate), consisting of a bulky and charge-delocalized cation and a small and charge-localized anion, greatly accelerates nucleophilic fluorinations using easy handling KF. We also successfully converted an inexpensive and commercially available ion-exchange resin to the polymer-supported ion pair promoter (A26–SO42–), which could be reused after filtration. Moreover, A26–SO42– can be used in continuous flow conditions. In our conditions, water is well-tolerated.

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