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2H-1-Benzopyran-6-carboxaldehyde is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

56540-75-1

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56540-75-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56540-75-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,5,4 and 0 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 56540-75:
(7*5)+(6*6)+(5*5)+(4*4)+(3*0)+(2*7)+(1*5)=131
131 % 10 = 1
So 56540-75-1 is a valid CAS Registry Number.

56540-75-1Downstream Products

56540-75-1Relevant academic research and scientific papers

CLAISEN REARRANGEMENT OF ARYL PROPARGYL ETHERS IN POLY(ETHYLENE GLYCOL) - A REMARKABLE SUBSTITUENT AND SOLVENT EFFECT

Rao, Usha,Balasubramanian, K. K.

, p. 5023 - 5024 (2007/10/02)

The Claisen rearrangement of aryl propargyl ethers in poly(ethylene glycol)-200 at 220 o C affords products in good yields.Aryl propargyl ethers containing electron donating groups yield (2H)-benzopyrans and those containing electron withdrawing groups yield 2-methylbenzofurans.

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