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118671-39-9

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118671-39-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 118671-39-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,6,7 and 1 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 118671-39:
(8*1)+(7*1)+(6*8)+(5*6)+(4*7)+(3*1)+(2*3)+(1*9)=139
139 % 10 = 9
So 118671-39-9 is a valid CAS Registry Number.

118671-39-9Downstream Products

118671-39-9Relevant articles and documents

Visible light-induced one-pot synthesis of CF3/CF2-substituted cyclobutene derivatives

Ding, Aishun,Guo, Hao,Hu, Xiao,Xu, Dawen

supporting information, p. 7441 - 7444 (2021/08/03)

An efficient one-pot approach for the controllable synthesis of trifluoromethyl/gem-difluoromethylene substituted cyclobutene derivatives has been developed. The mechanism may involve visible light-induced [2+2]-cycloaddition of quinolinones with 1-bromo-1-trifluoromethylethene, followed by base-promoted dehydrobromination, [1,3]-H shift and further dehydrofluorination. A variety of CF3/CF2-substituted cyclobutenes that are currently difficult to obtain are afforded in good yields in this protocol, which may find its way into future fluorinated cyclobutene preparation.

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