Synthesis of 1,1,2,2,3,3,4-heptafluorocyclopentane as a new generation of green solvent

Deactivation of porous aluminum fluoride‐supported noble metallic catalysts used in the hydrodechlorination of 1‐chloroheptafluorocylopentene

“…The 19F NMR spectra of the intermediates and products were recorded on a Bruker AVANCE 400 (400 MHz) NMR using CFC‐11 as an internal standard in CDCl 3 at 25°C. The 19F NMR data for F7‐1 and F7A were shown in previous studies …”

“…reported a continual process to synthesize F7A through the gas‐phase hydrodechlorination of F7‐1 with hydrogen, where the byproduct 1H‐heptafluorination and excess hydrogen can be recycled in the hydrodechlorination reactor and used to produce F7A . Hydrodechlorination catalysts include Pd/AlF 3 , 0.5%Pd/C, 2%Pd+0.2Bi%/C, 4.5%Pd+0.5%Bi/C, and Pd/CaF 2 . Route (1) is a promising method to produce F7A because F7‐1 is easy to obtain.…”

“…3 Hydrodechlorination catalysts include Pd/AlF 3 , 4 0.5%Pd/C, 5 2%Pd+0.2Bi%/C, 6 4.5%Pd+0.5%Bi/C, 7 and Pd/CaF 2 . 8,9 Route (1) is a promising method to produce F7A because F7-1 is easy to obtain. (2) The second route is the hydrogenation of 1H-heptafluorocyclopentene (F7E-1H) in the presence of a hydrogenation catalyst.…”

Isomerization of Halogenated Cyclopentene over a NH4F Catalyst

“…The conversion of F6-14 was maintained at nearly 70 %u pon increasing the temperature in the range of 50 to 140 8C, whereas the yields of F6-13 and F6-12 were maintained at close to 67 and 3%,r espectively.I na ddition, the amount of F6-13 was always double the amount of F6-14, and this was verified by the energies of the isomersa s determined by quantum-chemical calculations by using Gaussian 09. [12] F6-13 was isomerized into F6-14 and F6-12o ver the NH 4 F catalysti nD MF ( Table 1). The conversion of F6-13 increased from 45.3 to 73.8 %u pon increasing the temperature in the range of 50 to 140 8C, whereas the yield of F6-14d ecreased from 22.6 to 11.0 %a nd the yield of F6-12i ncreased from 22.7 to 62.8 %.…”

“…However,m ost of the halogenated cyclopentene was fluorinated with KF in DMF to produce other fluorinationp roducts. [12] Therefore, KF is not an ideal catalyst for the isomerization of halogenated cyclopentene. Until now,a ne fficient and specific isomerization catalyst that can be used in the isomerization of halogenated cyclopentene has not been reported.…”