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2-(2-cholorophenyl)-3-nitro-2H-chromene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

57544-09-9

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57544-09-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57544-09-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,5,4 and 4 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 57544-09:
(7*5)+(6*7)+(5*5)+(4*4)+(3*4)+(2*0)+(1*9)=139
139 % 10 = 9
So 57544-09-9 is a valid CAS Registry Number.

57544-09-9Relevant academic research and scientific papers

Augmentation of Enantioselectivity by Spatial Tuning of Aminocatalyst: Synthesis of 2-Alkyl/aryl-3-nitro-2 H-chromenes by Tandem Oxa-Michael-Henry Reaction

Bez, Ghanashyam,Mohanta, Rahul

, p. 4627 - 4636 (2020/05/01)

The asymmetric oxa-Michael addition of salicylaldehyde to conjugated nitroalkenes often suffers from poor reactivity and selectivity and a long reaction time. Because of the formation of an iminium ion with aminocatalyst, the nucleophilicity of the phenol

Mild and efficient reductive deoxygenation of epoxides to olefins with tin(II) chloride/sodium iodide as a novel reagent

Pathe, Gulab Khushalrao,Ahmed, Naseem

supporting information, p. 3542 - 3552 (2015/11/17)

A highly efficient and green protocol is reported for the reductive deoxygenation of organic epoxides to olefins using tin(II) chloride/sodium iodide as a novel reagent. The reaction gives an excellent yield (85-96%) in ethanol under reflux within 2-10 minutes, without affecting other functional groups. The advantages of our method are the use of inexpensive reagents, the eco-friendly and green reaction conditions, and the short reaction times and high yields.

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