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28645-07-0

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28645-07-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28645-07-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,6,4 and 5 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 28645-07:
(7*2)+(6*8)+(5*6)+(4*4)+(3*5)+(2*0)+(1*7)=130
130 % 10 = 0
So 28645-07-0 is a valid CAS Registry Number.

28645-07-0Relevant articles and documents

Alkylation of Aromatic Compounds with Optically Active Lactic Acid Derivatives: Synthesis of Optically Pure 2-Arylpropionic Acid Esters

Piccolo, Oreste,Spreafico,Franca,Visentin, Giuseppina,Valoti, Ermanno

, p. 3945 - 3946 (1985)

The alkylation of benzene with (S)-methyl 2-- or 2-(mesyloxy)propionate, in the presence of aluminum chloride, affords (S)-methyl 2-phenylpropionate in good chemical (50-80percent) and excellent optical yield (97percent as determined by rotation), with inversion of configuration at the attacking carbon atom.

Palladium-Catalyzed Asymmetric Markovnikov Hydroxycarbonylation and Hydroalkoxycarbonylation of Vinyl Arenes: Synthesis of 2-Arylpropanoic Acids

Guan, Zheng-Hui,Ren, Zhi-Hui,Wang, Yuan,Yang, Hui-Yi,Yao, Ya-Hong,Zou, Xian-Jin

supporting information, p. 23117 - 23122 (2021/09/18)

Asymmetric hydroxycarbonylation is one of the most fundamental yet challenging methods for the synthesis of carboxylic acids. Herein, we reported the development of a palladium-catalyzed highly enantioselective Markovnikov hydroxycarbonylation of vinyl arenes with CO and water. A monodentate phosphoramidite ligand L6 plays vital role in the reaction. The reaction tolerates a range of functional groups, and provides a facile and atom-economical approach to an array of 2-arylpropanoic acids including several commonly used non-steroidal anti-inflammatory drugs. The catalytic system has also enabled an asymmetric Markovnikov hydroalkoxycarbonylation of vinyl arenes with alcohols to afford 2-arylpropanates. Mechanistic investigations suggested that the hydropalladation is irreversible and is the regio- and enantiodetermining step, while hydrolysis/alcoholysis is probably the rate-limiting step.

Rhodium-Catalyzed Remote C(sp3)?H Borylation of Silyl Enol Ethers

Li, Jie,Qu, Shuanglin,Zhao, Wanxiang

supporting information, p. 2360 - 2364 (2020/01/02)

A rhodium-catalyzed remote C(sp3)?H borylation of silyl enol ethers (SEEs, E/Z mixtures) by alkene isomerization and hydroboration is reported. The reaction exhibits mild reaction conditions and excellent functional-group tolerance. This method is compatible with an array of SEEs, including linear and branched SEEs derived from aldehydes and ketones, and provides direct access to a broad range of structurally diverse 1,n-borylethers in excellent regioselectivities and good yields. These compounds are precursors to various valuable chemicals, such as 1,n-diols and aminoalcohols.

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