Preparation of trifluoroacetaldehyde and trifluoroacetic acid by trifluoroethanol catalytic oxidation;

Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane,trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

Effects of TFA on Amino Acids Catalyzed Asymmetric Direct Aldol Reaction

End-group modified poly(trimethylene terephthalate) polyester(PTT-TFA) was prepared by the esterification reaction between the hydroxyl end-groups of PTT and trifluoroacetic acid at room temperature,and its thermal properties were investigated by using the differential scanning calorimetry(DSC).

In the presence of copper(Ⅰ) iodide as the catalyst and under the protection of inert gas,aromatic halides including bromobenzene,iodobenzene,iodotuluene and iodonitrobenzene reacted with sodium trifluoroacetate to give the corresponding trifluoromethylated compounds in moderate to good yields.

, glass column), and was detected with flame ionization detector (FID) The oven temperature was set at 125 ℃, with injector and FID temperature at 160 ℃ The fenfluramine hydrochloride in the tablets was extracted with ethyl acetate and derivatized with trifluoroacetic anhydride at 40 ℃ for 30 min, and then analy.

Method Three derivative reagents such as acetic anhydride,trifluoroacetic anhydride chloride and 3,5-dinitro-benzoylchloride were selected,the derivatization conditions and results were investigated and compared by using GC.

1,1 -bis(trifluoroacetyl) ferrocene was synthesized from ferrocene and trifluoroacetic anhydride using anhydrous aluminum trichloride as catalyst.