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21067-52-7

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21067-52-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21067-52-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,6 and 7 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21067-52:
(7*2)+(6*1)+(5*0)+(4*6)+(3*7)+(2*5)+(1*2)=77
77 % 10 = 7
So 21067-52-7 is a valid CAS Registry Number.

21067-52-7Relevant academic research and scientific papers

O-iodoxy benzoic acid–mediated synthesis of 3,5-diarylisoxazoles and isoxazole-3-carboxylic acids

Desai, Vidya G.,Naik, Sneha R.,Dhumaskar, Kashinath L.

, p. 1453 - 1460 (2016/09/23)

A new, convenient, ecofriendly synthesis of 3,5-diarylisoxazoles is reported from a,b-unsaturated ketoximes. Similarly, a novel synthesis of isoxazole carboxylic acids is also reported. Both the methods use efficient, environmentally friendly, and nontoxic iodoxybenzoic acid (IBX) as an oxidative cyclizing reagent. Easy procedure, environmentally benign reaction conditions, and nontoxicity are advantages to the methodology.

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