A novel method for the synthesis of 2-chloro enesulfonamides via the one-pot addition-elimination of N-chloro-N-fluorobenzenesulfonamides (CFBSA) to styrenes in the presence of Et3N is described. A total of 20 examples are presented to illustrate this concept including various of styrenes.

A facile access to cis-dihydrofurobenzofuran from a Pd-catalyzed intramolecular oxidative C–O bond formation of 2-(2,5-dihydro-furan-2-yl)-phenol is reported. The combined use of Pd(OAc)2 as catalyst, acetonitrile as solvent and AgOAc or air as oxidant affords cis-dihydrofurobenzofurans in good (up to 83%) yields.

A structurally simple, highly reactive chlorinating reagent, N-chloro-N-fluorobenzenesulfonylamine (CFBSA), was conveniently prepared from inexpensive Chloramine B in high yield. A wide range of substrates were chlorinated with it to obtain products in good to high yields and appropriate selectivity.

A novel and practical reaction for the direct intramolecular oxidative coupling of butenylated arenes is reported. With the catalysis of Pd(OAc)2, reactions of various butenylated arenes and carboxylic acids with Selectfluor reagent in CH3CN solution afforded the corresponding monocarboxylation/cyclization products in good yields under mild conditions. This research demonstrated an economic method with the synthesis of 2-tetralyl carboxylic esters, a valuable class of bioactive compounds.

A series of functionalized 2,5-dihydrofurans were efficiently synthesized via an amine-promoted Petasis borono–Mannich reaction of 4-substituted 1,2-oxaborol-2(5H)-ols with salicylaldehydes in high yields. The process, which combines a boronic acid-based Mannich reaction and a highly efficient intramolecular SN2 cyclization, provides a one-step and efficient route toward 2,5-dihydrofurans from simple and stable starting materials.

•The polypropylene/polydimethylsiloxane/graphite fluoride (PP/PDMS/GF) composites are prepared.•The study of superhydrophobicity showed that the WCA reaches 148° with a sliding angle 6°.•Sandpapering and addition of GF can apparently increase superhydrophobicity.The polypropylene/polydimethylsiloxane/graphite fluoride (PP/PDMS/GF) composites are prepared with dynamic curing technology by simple blending of polypropylene, graphite fluoride and polydimethylsiloxane, and then their superhydrophobic properties are investigated. The results indicates that the static WCA reaches 148° with a sliding angle 6° for surface sandpapered PP/PDMS/GF = 100/20/15 composite, which supplies a much economical and convenient method for preparing superhydrophobic materials.The polypropylene/polydimethylsiloxane/graphite fluoride (PP/PDMS/GF) composites are prepared with dynamic curing technology by the simple blending of polypropylene, graphite fluoride and polydimethylsiloxane. The superhydrophobicity investigation indicates that the static WCA reaches 148° with a sliding angle 6° for surface sandpapered PP/PDMS/GF = 100/20/15 composite.

•The surface fluorinated polypropylene particles/polypropylene blends were prepared.•Their mechanical and thermodynamic properties varied with the ratio of SFPP/PP.•The blending of regular SFPP/PP particle improved its impact strength and flexural strength.The surface fluorinated polypropylene and PP (SFPP/PP) blend was obtained by direct fluorination of polypropylene particle with 3% F2/N2 gas and subsequent blending with polypropylene particle. The analyses indicated that the mechanical and thermodynamic properties of SFPP/PP blends such as tensile strength, impact strength, flexural strength, and cooling crystallization characteristics varied with the ratio of SFPP/PP. With the increase of SFPP in the blend, the tensile strength was decreased, while the impact strength and flexural strength might be improved. Meanwhile, fluorination resulted in the rise of melting point of PP. and in the DSC plot of SFPP/PP, annealing made the melting single peak split into double peak, which demonstrated that SFPP and PP were compatible but instable.The surface fluorinated polypropylene and PP (SFPP/PP) blend was obtained by direct fluorination of polypropylene particle with 3% F2/N2 gas and subsequent blending with polypropylene particle. The analyses indicated that the mechanical and thermodynamic properties of SFPP/PP blends such as tensile strength, impact strength, flexural strength, and cooling crystallization characteristics varied with the ratio of SFPP/PP. With the increase of SFPP in the blend, the tensile strength was decreased, while the impact strength and flexural strength might be improved. Meanwhile, fluorination resulted in the rise of melting point of PP. And in the DSC plot of SFPP/PP, annealing made the melting single peak split into double peak, which demonstrated that SFPP and PP were compatible but instable.

CF3-containing esters smoothly reacted with electron-deficient alkenes in the presence of a phosphine (2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl) organocatalyst at room temperature in an aerobic atmosphere. These Michael reactions efficiently provided products with a CF3 quaternary carbon center.

This paper studied the fluorination reaction of p-substituted benzenesulfonimides with diluted elemental fluorine to synthesize N-fluoro-benzenesulfonimide (NFSI) analogues. Several synthetic methods were compared and we found that, for many p-substituted benzenesulfonimides, the fluorination of their sodium salts with 10% F2–N2 mixed gas in acetonitrile at room temperature could afford NFSI analogues in moderate to good yields.Graphical abstractThe fluorination of the sodium salts of p-substituted benzenesulfonimide with 10% F2–N2 mixed gas in acetonitrile at room temperature could afford the corresponding N-fluoro-benzenesulfonimide (NFSI) analogues in moderate to good yields.Highlights► Developing method for the synthesis of N–F reagents is useful. ► An efficient procedure for the synthesis of NFSI analogues was realized. ► The p-substituted NFSI analogues were afforded in moderate to good yields.

The stereoselectivity of the reaction of (Rs)-trifluoromethyl α,β-unsaturated N-tert-butanesulfinyl ketimines with TMSCN was studied. The diastereomers of α-trifluoromethyl unsaturated cyano amines were obtained, respectively, in good yields with excellent diastereoselectivities in terms of the different solvents used. In c-hexane, the (S, Rs)-isomer was obtained with up to 17:1 dr, whereas the (R, Rs)-isomer was generated as the main product with up to 145:1 dr in DMF at −60 °C.Graphical abstractThe stereoselectivity of the reaction of (Rs)-trifluoromethyl α,β-unsaturated N-tert-butanesulfinyl ketimines with TMSCN was studied. The diastereomers of α-trifluoromethyl unsaturated cyano amines were obtained, respectively, in good yields with excellent diastereoselectivities in terms of the different solvents used. In c-hexane, the (S, Rs)-isomer was obtained with up to 17:1 dr, whereas the (R, Rs)-isomer was generated as the main product with up to 145:1 dr in DMF at −60 °C.Highlights► The reaction of chiral N-tert-butanesulfinyl ketimines with TMSCN was studied. ► Different diastereoselectivities were obtained in terms of the solvents used. ► In c-hexane, d.r. (2a:3a) of the addition products is up to 1:17. ► In DMF, a reversed diastereoselectivity was observed with up to 145:1 d.r. (2a:3a).

The surface fluorinated polypropylene/polypropylene blend (SFPP/PP) was obtained by direct fluorination of polypropylene particle with 3% F2/N2 gas and subsequently blending it with polypropylene particle and antioxidant 1010. The nonisothermal crystallization kinetics properties of SFPP/PP were investigated using differential scanning calorimetry and the results indicated the compatibility of SFPP/PP is good, the crystallization temperature T0, Tc and crystallization activation energy ΔE are increased, whereas enthalpy ΔHc are decreased with the incorporation of fluorine to PP. Several macrokinetic models such as Jeziorny, Ozawa and Mo are used to analyze the nonisothermal crystallization behavior of the blend, among which Mo equation supplies a convenient and reasonable kinetic approach to describe its crystallization process.Graphical abstractHighlights► The surface fluorinated polypropylene/PP blend was prepared. ► The nonisothermal crystallization kinetics properties of the blend were studied. ► DSC shows the incompatibility of surface fluorinated polypropylene and PP is good. ► Introducing fluorine into PP leads to its T0, Tc and ΔE increasing. ► Mo equation supplies a reasonable description for its crystallization behavior.

A structurally simple, highly reactive chlorinating reagent, N-chloro-N-fluorobenzenesulfonylamine (CFBSA), was conveniently prepared from inexpensive Chloramine B in high yield. A wide range of substrates were chlorinated with it to obtain products in good to high yields and appropriate selectivity.