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57928-75-3

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57928-75-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57928-75-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,9,2 and 8 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 57928-75:
(7*5)+(6*7)+(5*9)+(4*2)+(3*8)+(2*7)+(1*5)=173
173 % 10 = 3
So 57928-75-3 is a valid CAS Registry Number.

57928-75-3Relevant articles and documents

Base-Mediated O-Arylation of Alcohols and Phenols by Triarylsulfonium Triflates

Ming, Xiao-Xia,Tian, Ze-Yu,Zhang, Cheng-Pan

supporting information, p. 3370 - 3379 (2019/11/03)

A mild and efficient protocol for O-arylation of alcohols and phenols (ROH) by triarylsulfonium triflates was developed under transition-metal-free conditions. Various alcohols, including primary, secondary and tertiary, and phenols bearing either electron-donating or electron-withdrawing groups on the aryl rings were smoothly converted to form the corresponding aromatic ethers in moderate to excellent yields. The reactions were conducted at 50 or 80 °C for 24 h in the presence of a certain base and showed good functional group tolerance. The base-mediated arylation with asymmetric triarylsulfonium salts could selectively transfer the aryl groups of sulfoniums to ROH, depending on their inherent electronic nature. The mechanistic studies revealed that the reaction might proceed through the nucleophilic attack of the in situ formed alkoxy or phenoxy anions at the aromatic carbon atoms of the C?S bonds of triarylsulfonium cations to furnish the target products.

Tetrabutyl ammonium bromide-mediated benzylation of phenols in water under mild condition

Wang, Hailei,Ma, Yuping,Tian, Heng,Yu, Ajuan,Chang, Junbiao,Wu, Yangjie

, p. 2669 - 2673 (2014/04/03)

Benzylation of phenol was successfully achieved in water under room temperature mediated by tetrabutylammonium bromide (TBAB) for only 2 h affording the corresponding benzyl phenyl ether with good to excellent yields. This protocol is very efficient, simple, avoiding catalysts, easy to work-up after reaction, and especially 'green'.

PESTICIDAL SUBSTITUTED PHENYLETHERS

-

Page/Page column 42; 63, (2008/06/13)

The invention relates to the use of phenylether derivatives of formula (I), to compositions thereof for the control of pests, including arthropods and helminths.

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