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2-(diethoxyphosphonyl)-4-nitrophenyl 1,1,2,2-tetrafluoro-2-(1,1,2,2-tetrafluoroethoxy)-ethanesulfonate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

639516-91-9

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639516-91-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 639516-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,5,1 and 6 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 639516-91:
(8*6)+(7*3)+(6*9)+(5*5)+(4*1)+(3*6)+(2*9)+(1*1)=189
189 % 10 = 9
So 639516-91-9 is a valid CAS Registry Number.

639516-91-9Relevant academic research and scientific papers

A convenient and applicable route to synthesize 2-(1-alkynyl) phenylphosphonates

Peng, Ai-Yun,Zhang, Xin-Ying,Ding, Yi-Xiang

, p. 529 - 534 (2007/10/03)

A convenient and applicable route has been developed to synthesize various 2-(1-alkynyl)-phenylphosphonates starting from easily available phenols via palladium-catalyzed alkynyl dehydroxylation of 2-hydroxylphenylphosphonates.

The Synthesis of Phosphaisocoumarins by Cu(I)-Catalyzed Intramolecular Cyclization of o-Ethynylphenylphosphonic Acid Monoesters

Peng, Ai-Yun,Ding, Yi-Xiang

, p. 15006 - 15007 (2007/10/03)

Cu(I)-catalyzed intramolecular cyclization of o-ethynylphenylphosphonic acid monoethyl esters was examined, and a new class of six-membered phosphorus heterocycles was formed with high regioselectivity and good yields. The present reaction is the first ex

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