50 results about "Phosphorus halide" patented technology

The invention discloses a preparation method for phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide. The preparation method comprises the following steps: selecting triphenylphosphine as a raw material for reactions with sodium metal and phosphorus halide in the presence of one or more catalysts; carrying out an acyl chloride reaction; carrying out oxidation to prepare phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide. The preparation method has the advantages of being easy in raw material obtaining, low in cost, easy to operate, environmentally friendly, and easy for industrialization.

Disclosed is a method that is for producing 1-bromo-1-[3,5-bis(trifluoromethyl)phenyl] ethane having high optical purity, and that is a method containing a step for brominating optically active 1-[3,5-bis(trifluoromethyl)phenyl] ethanol using, as a brominating agent, either a) the combination of a phosphorus halide and hydrogen bromide, b) the combination of 1,2-dibromo-1,1,2,2-tetrachloroethane and the organophosphorus compound represented by general formula I, which is P(R1)(R2)(R3) (in the formula: R1, R2 and R3 each independently indicate a C6-10 aryl group, a C6-10 aryloxy group, a C1-10 alkyl group, a C1-10 alkoxyl group, a C3-6 cycloalkyl group, or a C3-6 cycloalkoxyl group), or c) the combination of N-bromosuccinimide and a dialkyl sulphide.

In a method for making bisphosphonates by reacting a carbonyl compound with a phosphorus halide, the reaction is carried out in a solvent / carrier system which is a mixture of an amine hydrochloride, phosphorous acid and optionally phosphoric acid.

The invention discloses a narrowband organic-inorganic hybrid red light emitting material and a preparation method for the same. The light emitting material is a type of coordination polymer obtained by self-assembling copper-phosphorus halide and 4,4-azopyridine (4-Azpy), and a molecular structure of the material is [(PPh3)2Cu2(mu-X)2(mu-4-Azpy)]n (X=Cl, Br, I), where PPh3 is triphenyl phosphine, and 4-Azpy is 4,4-azopyridine. The light emitting material is obtained by assembling and reacting Cu(PPh3)2X (X=Cl, Br, I) and 4,4-azopyridine, and has the advantages of easiness for preparation and purification, simple process, readily available raw materials and the like, is higher in thermal stability, and can be used as a narrowband red light emitting material, and red fluorescence of which the half-peak width does not exceed 15nm can be emitted at about 710nm.

The catalytic reforming method for hydrocarbons includes reformation of hydrocarbon material in the presence of reforming catalyst, and adding phosphorus halide in 0.1-50 ppm of hydrocarbon material into the hydrocarbon material during reformation. The method can reduce carbon deposition on reforming catalyst effectively and prolong the service life of catalyst.

The invention relates to a preparation method of tris(2-furyl) phosphine, which comprises the following steps of: in the atmosphere of inert gas, at the room temperature, dripping a butyl lithium solution in a normal hexane solution containing furan and tetramethylethylenediamine, raising the temperature to 40-60 DEG C, and keeping for 0.5-3 hours to produce a furyl lithium reagent; dripping phosphorus halide in the normal hexane solution at the temperature of minus 10 to 0 DEG C, carrying out heat insulation for 0.5-2 hours, naturally raising the temperature to the room temperature, and stirring for 1-8 hours; and pouring a reaction solution into a saturated strong acidic-weak basic inorganic salt solution, concentrating an organic phase to obtain a crude product, and then recrystallizing with of petroleum ether to obtain tris(2-furyl) phosphine. With the adoption of the preparation method, the preparation cost is greatly lowered, the yield is greatly increased, and the product purity is high. In the embodiment of the invention, anhydrous cerium trichloride is added into produced furyl lithium to obtain an organic cerium reagent, and the organic cerium reagent is further reacted with phosphorus trihalide, so the yield can be further increased, and the by-products can be reduced.

The invention relates to a synthesis method of etretinate ether. The synthesis method adopts (1-(5, 6, 7, 8-tetrahydrophthalic-5, 5, 8, 8-tetramethyl-2-naphthyl)-ethyl)-terphenyl phosphorus halide (II) and p-eormylbenzoic acid ester (III) as raw materials, carries out two-phase reaction under the condition of adding aqueous alkali into an organic solvent, and then obtains the etretinate ether. The method has mild reaction condition, short reaction time, simple and convenient operation, low cost and high yield.

The invention discloses a preparation method of 2,4,6-trimethylbenzoyldiphenyl phosphine oxide. According to the preparation method, triphenyl phosphine is taken as the raw material, triphenyl phosphine reacts with metal sodium and phosphorus halide to generate reaction product (I), the reaction product (I) reacts with acyl chloride to generate reaction product (II), and the reaction product (II) is oxidized to produce 2,4,6-trimethylbenzoyldiphenyl phosphine oxide. The preparation method has the advantages of easily-available raw materials, low cost, easy operation, environment-friendliness, and easiness for industrialization.