46results about How to "High rate of deuterium" patented technology

The invention provides a method for preparing deuterated aldehydes by using halomethyl compounds as raw materials. Described method comprises the steps: in the solvent that pyridine compound exists and D 2 Add halomethyl compounds to O mixed liquid, and react at 0°C~100°C; then add nitrosobenzene compounds to continue the reaction, and finally the reaction liquid is acidified to obtain the target product. The raw materials used in the method of the present invention are all cheap and easy to obtain, no expensive reagents or heavy metal raw materials are required, and the reaction conditions are simple, without harsh conditions such as high temperature, that is, the preparation method of the present invention is low in cost, simple in operation, and high in deuterium substitution rate. Up to 97%, the target product is easy to purify and the yield is high, up to 95%. Moreover, the substrate of the method of the present invention has wide applicability, and various deuterated aldehyde compounds can be prepared.

The invention relates to a method for synthesizing toluene-d8, which belongs to the synthesis technology of deuterated compounds. The pentahalogenated toluene is slowly added to the solvent to obtain a clear solution A; the solution A is transferred to the autoclave, and the deuterated reagent is slowly added to the solution in step 1 under nitrogen protection, and catalyst B is added. A mixed solution C was obtained, filtered and deionized water was added dropwise to obtain a filtrate D; after fractionation, heavy water, catalyst F and zeolite were added, and finally the solution was fractionated, and 110° C. fractions were taken to obtain toluene-d8. In the method, the halo-deuterium exchange reaction on the benzene ring and the hydrogen-deuterium exchange reaction on the methyl group are carried out step by step, which is conducive to the complete deuteration reaction, and the obtained product has a high deuteration rate; the use of the catalyst reduces the consumption of the deuterated reagent, It reduces the production cost and can effectively break the domestic market's dependence on imports.

The invention provides a deuterated supramolecular polymer, belonging to the technical field of supramolecular polymers. The deuterated supramolecular polymer is a bifunctional monomer with a deuterated polymer as a spacer obtained after ring-opening metathesis polymerization of a deuterated cycloalkene, through quadruple hydrogen bonds or metal coordination bonds. Quadruple hydrogen bonded deuterated supramolecular polymers or metal coordination deuterated supramolecular polymers formed by non-covalent interactions. The invention also provides a preparation method of the deuterated supramolecular polymer. The main chain of the deuterated supramolecular polymer of the present invention is connected to each other through non-covalent interaction, and has the advantages of self-repair and good processing performance. The preparation source of the deuterated supramolecular polymer of the present invention is simple, the process flow is simple, and the preparation of the deuterated supramolecular polymer with a controllable ratio of unsaturated carbon to saturated carbon can be realized by adjusting the type and molar ratio of deuterated cycloalkene , combined with hydrogen isotope addition reactions can adjust the ratio of hydrogen isotopes in the saturated product.

The invention discloses a method for synthesizing chiral amine. According to the method, a catalytic amount of ketone is used as a self-catalyst, alkali which is cheap and easy to get is used as a synergistic catalyst, a 1-aryl-alcoho compound is used as a substrate, chiral methylpropane-2-sulfinamide is used as an amine source, in an inert gas atmosphere, asymmetric amination reaction of alcoholis completed, and through a one-pot method, the chiral amine is obtained. According to the method for synthesizing the chiral amine, a reaction system is simple, operation is simple and convenient, economic benefits are high, transition metal catalysts or other auxiliary additives are not needed, a chiral product does not contain transition metal residues, and the method for synthesizing the chiral amine is clean, safe and efficient; moreover, the target product yield (41%-82%) is high, the stereoselectivity is good (a dr is 99:1), the defects that traditional raw material agents are expensive, a reaction system is complex, synthesis steps are tedious, a deuterated ratio is low, the stereoselectivity is low, and the like are overcome, and the method for synthesizing the chiral amine has very important application prospects in medicine synthesis especially.