82 results about "Hydroamination" patented technology

The invention relates to a method of preparing 1,2-diaminopropane from isopropanolamine and liquid ammonia. The method includes mixing the isopropanolamine and the liquid ammonia according to a certain ratio, pumping the mixture into a reactor and reacting under existence of a catalyst and hydrogen. The method adopts the novel catalyst which is excellent in catalytic performance and prone to long-term operation. The method allows production of a diaminopropane product by hydroamination of the isopropanolamine to be achieved under a low reaction pressure. By adjustment of reaction conditions, composition of products can be regulated flexibly and selectivity of a target product is improved. A reaction process is simple. One-time investment of production devices and a production cost are reduced. Separation of a reaction product from the catalyst is simple. The method is prone to large-scale continuous industrial production.

The invention discloses a continuous preparation method of amine-terminated polyether, and the method comprises the following steps of: taking polyether polyol, H2 and NH3 as raw materials, executing critical hydroamination in a fixed bed reactor under a critical hydroamination catalyst, executing gas-liquid separation in a gas-liquid separator to feed liquid from the fixed bed reactor, reusing NH3 and H2 without being reacted after being dried and pressurized; accessing the liquid material into a vacuum chamber, removing H2O and other small-molecule materials in vacuum, continuously discharging to prepare amine-terminated polyether. The method is continuous in operating processes and more steady in a product quality batch method; in preparation, the gas can be reused to prevent environmental pollution; the method can effectively solve the problems of decreased conversion and weak selectivity caused by poorly contacting the gas and the catalyst during large-molecular polyether reaction; the method has the advantages of higher reaction conversion ratio and primary amine selectivity.

This invention relates to phosphoramidite compounds and catalyst complexes which can be used to provide enantioselective reactions including hydroamination reactions, etherification reactions and conjugate addition reactions and allylic substitution reactions, among others. In a first aspect, the present invention is directed to phosphoramidite and related compounds according to general structure (I), where Z is absent or is a group containing O, N or S, preferably O; R1 and R2 are independently an optionally substituted C1-12 alkyl group, an optionally substituted (CH2)n-aromatic group or (CH2)n-heteroaromatic group, or are linked together to form an optionally substituted aliphatic or (CH2)n-aromatic dianion of a diol, diamine, dithiol, aminoalcohol, aminohiolate or a alcoholthiol group; R3′ and R3 are each independently H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic group with the proviso that R3′ and R3 are not both H, or together R3′ and R3 form an optionally substituted C5-C15 saturated or unsaturated carbocyclic ring; R4 is H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic group; R5 is absent, H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic or (CH2)n-heteroaromatic group; Ra and Ra′ are each independently H or a C1-C3 alkyl group, or Ra and Ra′ together with the carbon to which they are attached form a optionally substituted C5-C15 saturated or unsaturated carbocyclic or heterocyclic ring, or an aromatic or heteroaromatic ring; R6 and R7 are each independently H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic group, with the proviso that R5, R6 and R7 cannot simultaneously be H, and when Ra and Ra′, together with the carbon to which they are attached, form a carbocyclic ring, heterocyclic ring or an aromatic or heteroaromatic ring, R5 is absent or is preferably H; R6 and R7 are preferably H or CH3; and each n is independently 0, 1, 2, 3, 4, 5 or 6 and wherein at least one of the carbon atoms attached to the nitrogen of the phosphoramidite group is a chiral center.

This invention relates to a polyolefin composition comprising one or more of the following formulae:wherein the PO is the residual portion of a vinyl terminated macromonomer (VTM) having had a terminal unsaturated carbon of an allylic chain and a vinyl carbon adjacent to the terminal unsaturated carbon; R1 is a hydrogen atom, an aryl group, or an alkyl group, wherein the aryl group or alkyl group can include one or more heteroatoms, an alkyl or aryl amino group, a polyalkylamino group; wherein the VTM is a vinyl terminated macromonomer.

Alkylamine production by reaction of olefins with ammonia or primary or secondary amines under hydroamination conditions with a calcined zeolitic catalyst is such that at most 24 hours before the reaction the catalyst is heat- activated at 100-550degreesC in a gas stream of air, nitrogen and / or other inert gases.

The invention belongs to the technical field of synthetic chemistry, and in particular relates to a trivalent iridium imine complex containing iridium nitrogen double bonds, a preparation method and an application of the trivalent iridium imine complex. A binuclear iridium compound cyclooctadiene iridium chloride dimer [ (COD) IrCl ]2 is taken as a raw material, and the binuclear iridium compoundiridium(I) cyclooctadiene chloride, dimer [ (COD) IrCl ]2 reacts with phenyl dipyrrole compounds under an alkaline condition to obtain a precursor containing a monovalent iridium complex, and the precursor is oxidized into the trivalent iridium imine compound containing the iridium nitrogen double bonds by using an azide oxidation method. The synthesis process is simple and green, and has excellent selectivity and higher yield. The trivalent iridium imine complex has the characteristics of stable physical and chemical properties, thermal stability and the like, and shows excellent activity andregioselectivity (anti-Markovnikov's rule) in hydroamination of olefins.

This invention relates to phosphoramidite compounds and catalyst complexes which can be used to provide enantioselective reactions including hydroamination reactions, etherification reactions and conjugate addition reactions and allylic substitution reactions, among others. In a first aspect, the present invention is directed to phosphoramidite and related compounds according to general structure (I), where Z is absent or is a group containing O, N or S, preferably O; R<1> and R<2> are independently an optionally substituted C1-12 alkyl group, an optionally substituted (CH2)n-aromatic group or (CH2)n-heteroaromatic group, or are linked together to form an optionally substituted aliphatic or (CH2)n-aromatic dianion of a diol, diamine, dithiol, aminoalcohol, aminohiolate or a alcoholthiol group; R<3'> and R<3> are each independently H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic group with the proviso that R<3'> and R<3> are not both H, or together R<3'> and R<3> form an optionally substituted C5-C15 saturated or unsaturated carbocyclic ring; R<4> is H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic group; R<5> is absent, H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic or (CH2)n-heteroaromatic group; R and R are each independently H or a C1-C3 alkyl group, or R and R together with the carbon to which they are attached form a optionally substituted C5-C15 saturated or unsaturated carbocyclic or heterocyclic ring, or an aromatic or heteroaromatic ring; R<6> and R<7> are each independently H, an optionally substituted C1-C12 alkyl group or an optionally substituted (CH2)n-aromatic group, with the proviso that R<5>, R<6> and R<7> cannot simultaneously be H, and when R and R, together with the carbon to which they are attached, form a carbocyclic ring.

The invention provides a method for preparing an enamine compound by catalyzing phenylacetylene and utilizing the hydroamination reaction. The method is characterized by comprising the steps that thephenylacetylene and secondary amine are taken as raw materials, under the effect of a nickelous imine complex catalyst, the hydroamination reaction is conducted in a solvent, after finishing of the reaction and after-treatment, the enamine product is obtained, wherein the molecular formula of the nickelous imine complex catalyst is [R1R2C (C5H4N) 2] Ni=NPh, R1 and R2 are independently selected from H, CH3 and Ph, and arene is the solvent. The catalyst has extremely high catalytic activity and regioselectivity, the synthesizing technology is simple and green, good selectivity and high yield areachieved, the atom economy is good, and production of waste gas, waste water and industrial residues is reduced; the method protects the environment, and is simple in operation and suitable for industrial production.

Methods are provided for the catalytic hydroamination of compounds having an alkyne or allene functional group, in which the compound is contacted with ammonia or an amine in the presence of a catalytic amount of a gold complex under conditions sufficient for hydroamination to occur.

The invention discloses a continuous preparation method of amine-terminated polyether, and the method comprises the following steps of: taking polyether polyol, H2 and NH3 as raw materials, executing critical hydroamination in a fixed bed reactor under a critical hydroamination catalyst, executing gas-liquid separation in a gas-liquid separator to feed liquid from the fixed bed reactor, reusing NH3 and H2 without being reacted after being dried and pressurized; accessing the liquid material into a vacuum chamber, removing H2O and other small-molecule materials in vacuum, continuously discharging to prepare amine-terminated polyether. The method is continuous in operating processes and more steady in a product quality batch method; in preparation, the gas can be reused to prevent environmental pollution; the method can effectively solve the problems of decreased conversion and weak selectivity caused by poorly contacting the gas and the catalyst during large-molecular polyether reaction; the method has the advantages of higher reaction conversion ratio and primary amine selectivity.