108results about "Organic addition" patented technology

Grafting a polymer at the surface of a carbonated material containing carboxyl, amine and / or hydroxyl functions at its surface. This material is suspended in a solution comprising the polymer to be grafted, which includes a carboxyl, amine and / or hydroxyl function, the solution also comprising a solvent of the polymer. This is followed by a treatment causing dehydration into a carboxyl function, an amide and / or hydroxyl function and the polymer is thus grafted on the carbonated material by means of ester or amide bonds. Utilization in the cathode or anode of an electrochemical generator, in a polymer material with low polarity, in an ink, and as a conductive deposit on flexible plastic used as electrical contact, electromagnetic protection and antistatic protection.

Method of performing alkylation or acylation reactions of aromatic substrates under supercritical or near-critical reaction conditions. In particular, a method of performing Friedel-Crafts alkylation or acylation reactions is disclosed under those conditions. Friedel-Crafts reactions may be effected using a heterogeneous catalyst in a continuous flow reactor containing a super-critical or near-critical reaction medium. Selectivity of product formation can be achieved by varying one or more of the temperature, pressure, catalyst, flow rates and also by varying the ratios of aromatic substrate to acylating or alkylating agent.

The invention discloses a synthesis method of a photocatalytic tertiary amine compound. The method is specifically carried out according to the steps of: adding a photosensitizer and an alkaline substance into a Schlenk reaction tube, in a nitrogen atmosphere, dissolving olefin shown as formula I, formula II or formula III and tertiary amine shown as formula IV in an organic solvent to obtain a mixed solution, adding the mixed solution into the above reaction tube, carrying out stirring reaction for 6-14h at 25DEG C under the irradiation of a light source, and performing aftertreatment on theobtained reaction solution to obtain an amine compound shown as formula V, formula VI or formula VII respectively; wherein the mole ratio of the photosensitizer, the alkaline substance, the olefin shown as formula I, formula II or formula III and the tertiary amine shown as formula IV is 0.05:1-2:1:1.5-2.5. The method disclosed by the invention can be used for synthesis of tertiary amine that is difficult to prepare by existing method; a cheap and easily available copper-based catalyst is employed to replace a noble metal catalyst, and the toxicity is low; and the method has the advantages ofmild reaction conditions, saving of energy consumption, high yield, strong substrate universality, simple operation and the like.

A process for forming polysaccharide structures such as beads, gel films and porous coatings on porous substrates by forming a room temperature gel-inhibited solution of a polysaccharide, one or more gel-inhibiting agent(s) and a solvent such as water, heating the mixture until all the components are dissolved, cooling the mixture as a solution to about room temperature, forming a three dimensional structure with the solution and adding the structure to a gelling agent to form a polysaccharide gel. Optionally, the solution can be added to a porous structure such as a non-woven fabric or a porous membrane and the solution is allowed to dry before being subjected to the gelling agent. Porous structures having a polysaccharide coating and being capable of convective flow through the pores of the structure and diffusive flow through the coating can be formed.

A palladium(II) complex of formula (1) or a palladium(II) complex of formula (3).Also, processes for the preparation of the complexes, and their use in carbon-carbon and carbon-heteroatom coupling reactions.

The present invention relates to one kind of bifunctional chiral catalyst container sacchariferous semicarbazide and thiocarbamide and its preparation process and application in asymmetry reaction. The preparation process includes: the reaction of saccharide with NCX or NH radical and ethamide with NH2 or NCX radical in the 2-position in organic solvent at 20-110 deg.c for 3-24 hr, evaporation to eliminate solvent and separation in a silica gel column to obtain the product. The molar ratio between saccharide with NCX or NH radical and ethamide with NH2 or NCX radical in the 2-position is 1 to 1-1.5. The bifunctional chiral catalyst has wide application, may be used in condensation reaction, addition reaction, etc. and has very high stereo selectivity and i.e. value up to 98 %.