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20908-27-4

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20908-27-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20908-27-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,0 and 8 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20908-27:
(7*2)+(6*0)+(5*9)+(4*0)+(3*8)+(2*2)+(1*7)=94
94 % 10 = 4
So 20908-27-4 is a valid CAS Registry Number.

20908-27-4Relevant articles and documents

PHOTOISOMERIZATION OF 3-BENZOYLACRYLATES ON A SILCA GEL SURFACE: EFFECT OF REACTION ENVIRONMENT ON SELECTIVITY

Hasegawa, Tadashi,Yamazaki, Yuko,Yoshioka, Michikazu

, p. 31 - 34 (1995)

On irradiation on a dry silica gel surface, 2-(N,N-dialkylamino)ethyl 3-benzoylacrylates undergo selective E-Z isomerization.Competing processes, such as remote-hydrogen abstraction via a charge-transfer state, with the photoisomerization in solution are

Chiral Hydroxytetraphenylene-Catalyzed Asymmetric Conjugate Addition of Boronic Acids to Enones

Chai, Guo-Li,Sun, A-Qiang,Zhai, Dong,Wang, Juan,Deng, Wei-Qiao,Wong, Henry N.C.,Chang, Junbiao

supporting information, p. 5040 - 5045 (2019/07/03)

(S)-2,15-Br2-DHTP-catalyzed asymmetric conjugate addition of boronic acids to β-trifluoromethyl α,β-unsaturated ketones and enones was studied. The reaction afforded the corresponding Michael addition products in moderate to high yields with excellent enantioselectivities (up to 99:1 er). This catalytic system features mild reaction conditions, high efficiency, and tolerance to heteroarylboronic acids.

A robust multifunctional ligand-controlled palladium-catalyzed carbonylation reaction in water

Gao, Pei-Sen,Zhang, Kan,Yang, Ming-Ming,Xu, Shan,Sun, Hua-Ming,Zhang, Jin-Lei,Gao, Zi-Wei,Zhang, Wei-Qiang,Xu, Li-Wen

supporting information, p. 5074 - 5077 (2018/05/26)

A novel, hydrophilic and recyclable methoxypolyethylene glycol (PEG)-modulated s-triazine-based multifunctional Schiff base/N,P-ligand L9 was prepared and used in Pd-catalyzed Heck-type carbonylative coupling reactions, affording diverse chalcone derivatives and 1,4-dicarbonyl esters in good yields.

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