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33020-71-2

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33020-71-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33020-71-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,0,2 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 33020-71:
(7*3)+(6*3)+(5*0)+(4*2)+(3*0)+(2*7)+(1*1)=62
62 % 10 = 2
So 33020-71-2 is a valid CAS Registry Number.

33020-71-2Downstream Products

33020-71-2Relevant articles and documents

Synthesis of C3-Fluorinated Oxindoles through Reagent-Free Cross-Dehydrogenative Coupling

Wu, Zheng-Jian,Xu, Hai-Chao

, p. 4734 - 4738 (2017)

Reported herein is an unprecedented synthesis of C3-fluorinated oxindoles through cross-dehydrogenative coupling of C(sp3)-H and C(sp2)-H bonds from malonate amides. Under the unique and mild electrochemical conditions, the requisite oxidant and base are generated in a continuous fashion, allowing the formation of the base- and heat-sensitive 3-fluorooxindoles in high efficiency with broad substrate scope. The synthetic usefulness of the electrochemical method is further highlighted by its easy scalability and the diverse transformations of the electrolysis product.

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