An entirely new methodology for synthesizing perfluorinated compounds: Synthesis of perfluoroalkanesulfonyl fluorides from non-fluorinated compounds
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.
AMIDINE COMPOUNDS AND USE THEREOF FOR PLANT DISEASE CONTROL
An amidine compound represented by formula (1): wherein R1 represent a C1-C11 fluoroalkyl group, a C3-C11 fluoroalkenyl group or a C3-C11 fluoroalkynyl group; R2 represent a C1-C3 alkyl group; R3 represent a C1-C3 alkyl group; R4 represent a C3-C6 cycloalkyl group or a C1-C6 alkyl group optionally having one or more halogens and R5 represent a C3-C6 cycloalkyl group or a C1-C6 alkyl group optionally having one or more halogens, said compound having excellent plant disease controlling effect.
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Page/Page column 131-132
(2012/07/14)
Various synthetic approaches to fluoroalkyl p-nitrophenyl ethers
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.
Preschera, Dietrich,Thiele, Thomas,Ruhmann, Ralf
p. 145 - 148
(2007/10/03)
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