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16668-99-8

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16668-99-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16668-99-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,6 and 8 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 16668-99:
(7*1)+(6*6)+(5*6)+(4*6)+(3*8)+(2*9)+(1*9)=148
148 % 10 = 8
So 16668-99-8 is a valid CAS Registry Number.

16668-99-8Relevant articles and documents

Reaction of arenes with iodine in the presence of potassium peroxodisulfate in trifluoroacetic acid. Direct and simple synthesis of diaryliodonium triflates

Hossain, Delwar Md.,Ikegami, Yasuyuki,Kitamura, Tsugio

, p. 9903 - 9905 (2006)

Diaryliodonium triflates have been directly prepared by reaction of arenes with elemental iodine in good yields by using K2S2O 8 and TFA, followed by treatment with NaOTf. This procedure avoids the use of high temperature

Palladium-Catalyzed Four-Component Carbonylative Cyclization Reaction of Trifluoroacetimidoyl Chlorides, Propargyl Amines, and Diaryliodonium Salts: Access to Trifluoromethyl-Containing Trisubstituted Imidazoles

Chen, Zhengkai,Wang, Wei-Feng,Yang, Hefei,Wu, Xiao-Feng

supporting information, p. 1980 - 1984 (2020/03/04)

A palladium-catalyzed four-component carbonylative cyclization reaction for the expeditious construction of trifluoromethyl-containing trisubstituted imidazoles has been achieved. With readily accessible trifluoroacetimidoyl chlorides, propargyl amines, a

Transition-Metal-Free N-Arylation of Pyrazoles with Diaryliodonium Salts

Gonda, Zsombor,Novák, Zoltán

supporting information, p. 16801 - 16806 (2015/11/16)

A new synthetic method was developed for the N-arylation of pyrazoles using diaryliodonium salts. The transformation does not require any transition-metal catalyst and provides the desired N-arylpyrazoles rapidly under mild reaction condition in the presence of aqueous ammonia solution as a mild base without the use of inert atmosphere. The chemoselectivity of unsymmetric diaryliodonium salts was also explored with large number of examples.

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