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1204817-26-4

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1204817-26-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1204817-26-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,0,4,8,1 and 7 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1204817-26:
(9*1)+(8*2)+(7*0)+(6*4)+(5*8)+(4*1)+(3*7)+(2*2)+(1*6)=124
124 % 10 = 4
So 1204817-26-4 is a valid CAS Registry Number.

1204817-26-4Downstream Products

1204817-26-4Relevant articles and documents

CuI-mediated sequential iodination/cycloetherification of o-arylphenols: Synthesis of 2- or 4-iododibenzofurans and mechanistic studies

Zhao, Jiaji,Liu, Lanying,He, Yimiao,Li, Jing,Zhu, Qiang,Zhang, Qi,Li, Juan

supporting information, p. 5362 - 5365,4 (2012/12/12)

An efficient synthesis of 2- or 4-iododibenzofurans through CuI-mediated sequential iodination/cycloetherification of two aromatic C-H bonds in o-arylphenols has been developed. Both the preexisting electron-withdrawing groups (NO2, CN, and CHO) and the newly introduced iodide are readily modified for a focused dibenzofuran library synthesis. Mechanistic studies and DFT calculations suggest that a Cu(III)-mediated rate-limiting C-H activation step is involved in cycloetherification.

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