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2109-83-3

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2109-83-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2109-83-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,0 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 2109-83:
(6*2)+(5*1)+(4*0)+(3*9)+(2*8)+(1*3)=63
63 % 10 = 3
So 2109-83-3 is a valid CAS Registry Number.

2109-83-3Relevant articles and documents

Copper-catalyzed intramolecular carbotrifluoromethylation of alkynes for the construction of trifluoromethylated heterocycles

Wang, Yanan,Jiang, Min,Liu, Jin-Tao

supporting information, p. 15315 - 15319 (2016/02/18)

A mild and efficient copper-catalyzed intramolecular carbotrifluoromethylation of alkynes has been achieved in the presence of Togni reagent as trifluoromethylating reagent. The reaction tolerates a range of substrates to give a group of trifluoromethylated heterocycles with high selectivities. A plausible mechanism was proposed on the basis of experimental results. And the Togni award goes to Copper-catalyzed intramolecular carbotrifluoromethylation of alkynes is carried out with a Togni reagent as the trifluoromethylating reagent (see scheme). Various trifluoromethylated heterocycles are synthesized in moderate to good yields. Moreover, a range of common functional groups is tolerated under the reaction conditions.

Improved Synthesis of Aryl 1,1-Dimethylpropargyl Ethers

Godfrey, Jollie D.,Mueller, Richard H.,Sedergran, Thomas C.,Soundarajan, Nachimuthu,Colandrea, Vincent J.

, p. 6405 - 6408 (2007/10/02)

An efficient, general, and practical synthesis of aryl 1,1-dimethylpropargyl ethers has been developed.

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