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168632-11-9

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168632-11-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 168632-11-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,8,6,3 and 2 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 168632-11:
(8*1)+(7*6)+(6*8)+(5*6)+(4*3)+(3*2)+(2*1)+(1*1)=149
149 % 10 = 9
So 168632-11-9 is a valid CAS Registry Number.

168632-11-9Relevant articles and documents

An entirely new methodology for synthesizing perfluorinated compounds: Synthesis of perfluoroalkanesulfonyl fluorides from non-fluorinated compounds

Okazoe, Takashi,Murotani, Eisuke,Watanabe, Kunio,Itoh, Masahiro,Shirakawa, Daisuke,Kawahara, Kengo,Kaneko, Isamu,Tatematsu, Shin

, p. 1695 - 1701 (2004)

A new synthetic procedure for the preparation of perfluoroalkanesulfonyl fluorides utilizing liquid-phase direct fluorination with elemental fluorine has been developed. Direct fluorination of a partially fluorinated ester, which has alkanesulfonyl fluoride in the end, was synthesized from non-fluorinated counterparts and perfluorinated acid fluoride according to the PERFECT process, gave the desired perfluorinated product in moderate yield as well as by-products arising from CS bond cleavage. The results of the direct fluorination of some model substrates suggest that the CS bond cleavage occurred due to radical formation at the α-position rather than the β-position.

Various synthetic approaches to fluoroalkyl p-nitrophenyl ethers

Preschera, Dietrich,Thiele, Thomas,Ruhmann, Ralf

, p. 145 - 148 (2007/10/03)

Homologous 1H,1H-perfluoroalkyl p-nitrophenyl ethers (alkyl = C2-C8) were synthesized using different methods. The results are discussed in context with contradictory comments of the literature. The fluoroalkoxylation of p-chloronitrobenzene occurs in only one step, but it is limited to small fluoroalkyl groups. The fluoroalkylation of p-nitrophenol via sulphonic acid esters is a better synthetic route. Differences in reactivity and yield between tosylates, mesylates and inflates are found and discussed. The preferred synthesis includes the use of trifluoromethane sulphonic acid esters.

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