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82477-43-8

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82477-43-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 82477-43-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,4,7 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 82477-43:
(7*8)+(6*2)+(5*4)+(4*7)+(3*7)+(2*4)+(1*3)=148
148 % 10 = 8
So 82477-43-8 is a valid CAS Registry Number.

82477-43-8Relevant articles and documents

Efficient synthesis of unsymmetrical S-(bromodifluoromethyl)diarylsulfonium salts for electrophilic bromodifluoromethylating reagents

Liu, Guokai,Mori, Satoru,Wang, Xin,Noritake, Shun,Tokunaga, Etsuko,Shibata, Norio

supporting information; experimental part, p. 1769 - 1773 (2012/10/08)

A series of unsymmetrical S-(bromodifluoromethyl)diarylsulfonium salts 1 were readily synthesized by treatment of corresponding (bromodifluoromethyl) arylsulfoxides 2 and substituted benzenes 3 with triflic anhydride in moderate to good yields. The unsymmetrical sulfonium salts 1 with different aryl groups having electron-donating or electron-withdrawing substituents can be nicely constructed depending on the choice of 2 and 3. Bromodifluoromethylation of alkynes was evaluated by using the selected diarylsulfonium salts 1 to provide the desired bromodifluoromethylated alkynes in moderate to good yields.

New electrophilic bromodifluoromethylation and pentafluoroethylation reagents

Zhang, Cheng-Pan,Cao, Hai-Ping,Wang, Zong-Ling,Zhang, Chun-Tao,Chen, Qing-Yun,Xiao, Ji-Chang

supporting information; experimental part, p. 1089 - 1092 (2010/06/21)

S-(fluoroalkyl)diphenylsulfonium salts have been successfully synthesized from the reaction between fluoroalkylsul-finates and triflic anhydride in dichloromethane through a one-pot procedure. These S-(fluoroalkyl) diphenylsulfonium salts have been demonstrated to be effective reagents to fluoroalkylate C-nucleophilic substrates. Ionic substitution and radical or halogenophilic mechanism might be all involved in the reactions. Georg Thieme Verlag Stuttgart - New York.

Highly regioselective synthesis of gem-difluoroallenes through magnesium organocuprate SN2′ substitution

Mae, Masayuki,Hong, Jiyoung A.,Xu, Bo,Hammond, Gerald B.

, p. 479 - 482 (2007/10/03)

The reaction of gem-difluoropropargyl electrophiles with Grignard reagents is complicated by the inherent difficulty of executing nucleophilic substitutions on a CF2 group, and the facile formation of carbenoid intermediates arising from α-elimination of fluoride. In the presence of an excess amount of a copper salt, a Grignard reagent reacts with gem-difluoropropargyl bromide via an SN2′ mechanism to produce gem-difluoroallene in high yield. If desired, the resulting difluoroallene can undergo a second nucleophilic attack on the CF2 terminus to yield a trisubstituted monofluoroallene through an addition-elimination mechanism.

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