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392302-53-3

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392302-53-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 392302-53-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,9,2,3,0 and 2 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 392302-53:
(8*3)+(7*9)+(6*2)+(5*3)+(4*0)+(3*2)+(2*5)+(1*3)=133
133 % 10 = 3
So 392302-53-3 is a valid CAS Registry Number.

392302-53-3Relevant articles and documents

An environmentally benign synthesis of aurones and flavones from 2′-acetoxychalcones using n-tetrabutylammonium tribromide

Bose, Gopal,Mondal, Ejabul,Khan, Abu T,Bordoloi, Manob J.

, p. 8907 - 8909 (2007/10/03)

A wide variety of aurones (3a-f) can be prepared exclusively from 2′-acetoxychalcones (1a-f) in high yields in two steps, by bromination using n-tetrabutylammonium tribromide (TBATB) in the presence of CaCO3 in CH2Cl2-MeOH (5:2) at 0-5°C followed by cyclization of the brominated products 2a-f on treating with 0.2 M ethanolic KOH solution at 0-5°C, respectively. In contrast various flavone derivatives 6a-f can be obtained exclusively from compounds 1a-f in fairly good yields, by brominating with the same reagent in CH2Cl2, followed by dehydrobromination and finally cyclization on treating with 0.1 M NaOMe solution.

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