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4888-03-3

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4888-03-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4888-03-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,8,8 and 8 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4888-03:
(6*4)+(5*8)+(4*8)+(3*8)+(2*0)+(1*3)=123
123 % 10 = 3
So 4888-03-3 is a valid CAS Registry Number.

4888-03-3Relevant articles and documents

Highly Enantioselective Cobalt-Catalyzed Hydroboration of Diaryl Ketones

Liu, Wenbo,Guo, Jun,Xing, Shipei,Lu, Zhan

, p. 2532 - 2536 (2020/04/02)

A highly enantioselective cobalt-catalyzed hydroboration of diaryl ketones with pinacolborane was developed using chiral imidazole iminopyridine as a ligand to access chiral benzhydrols in good to excellent yields and ee. This protocol could be carried out in a gram scale under mild reaction conditions with good functional group tolerance. Chiral biologically active 3-substituted phthalide and (S)-neobenodine could be easily constructed through asymmetric hydroboration as a key step.

At normal pressure fragrant ketone copper catalytic synthesis method

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Paragraph 0032; 0033; 0038, (2017/07/14)

The invention discloses a method of synthesizing diaryl ketone under normal pressure by virtue of copper catalysis. The method is as follows: in a solvent alcohol or aqueous liquor of alcohol, under action of alkali and acid, adding a copper catalyst, alkyl iodide, alkyl boric acid and carbon monoxide to directly carry out crossed coupling reaction to prepare diaryl ketone compounds. According to the invention, the method of preparing diaryl ketone compounds by carbonylation Suzuki coupling reaction has the advantages as follows: the catalyst is wide in source, cheap and small in toxicity; the reaction is free of ligand in reaction and good in activity; the reaction is carried out under the normal pressure and selectivity is high; a substrate source is wide and stable; functional group compatibility is good and scope of application for the substrate is wide; a reaction medium is environment-friendly and recyclable. Under the condition of optimizing reaction conditions, the target product separating yield is 95%.

Copper-catalyzed carbonylative Suzuki coupling of aryl iodides with arylboronic acids under ambient pressure of carbon monoxide

Cheng, Laijin,Zhong, Yanzhen,Ni, Zhuchao,Du, Hongyan,Jin, Fengli,Rong, Qi,Han, Wei

, p. 44312 - 44316 (2014/12/10)

An efficient and ligandless nanocopper-catalyzed carbonylative cross-coupling of aryl iodides with arylboronic acids at ambient CO pressure in poly(ethylene glycol), has been developed. This protocol is general, practical, and recyclable, and offers an attractive alternative to the corresponding palladium-mediated carbonylative Suzuki process for the construction of biaryl ketone scaffolds.

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