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Butanoic acid, 3-oxo-2-[(4-oxo-4H-1-benzopyran-3-yl)methylene]-, ethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

57443-89-7

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57443-89-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57443-89-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,4,4 and 3 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 57443-89:
(7*5)+(6*7)+(5*4)+(4*4)+(3*3)+(2*8)+(1*9)=147
147 % 10 = 7
So 57443-89-7 is a valid CAS Registry Number.

57443-89-7Relevant academic research and scientific papers

A Mild and Efficient Route to 3-Vinylchromones in Aqueous Micellar Media

Kumar, Vikash,Chatterjee, Amrita,Banerjee, Mainak

, p. 2364 - 2377 (2015)

A simple, mild, and ecofriendly method has been developed for the synthesis of 3-vinylchromones from 4-oxo-4H-1-benzopyran-3-carboxaldehyde (3-formylchromone) by simple Knoevenagel condensation with various active methylene compounds (AMC) in aqueous mice

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