9 results about "Carbocation" patented technology

The invention relates to the technical field of synthesis of ambrota ethers, and discloses a synthesis method of ambrota ethers, the reaction is mainly carried out through a synergistic way, and in the presence of fluorinated alcohol, the strong acidic site of an imino diphosphoryl imide ester catalyst promotes protonation of a distal double bond of (3E, 7E)-homofarnesyl alcohol to form a cationic intermediate. Meanwhile, the imino diphosphoryl imide ester catalyst promotes the (3E, 7E)-homofarnesyl alcohol to be combined in an all-trans conformation manner, and guides carbocations and olefin to be subjected to stereotactic addition, so that a polyene cyclization reaction with high diastereoselectivity and enantioselectivity is realized, and the ambrota ether is finally generated. The fluorinated alcohol stabilizes the cation intermediate through a hydrogen bond, so that the activity and selectivity of the reaction are further improved. The synthesis method of ambrota ether is low in cost and efficient.

This invention relates to the field of solid electrolyte materials technology, and more particularly to an aluminum-based halide oxide solid electrolyte with a coating layer, its preparation method, and its application. The aluminum-based halide oxide solid electrolyte with a coating layer comprises aluminum-based halide oxide solid electrolyte particles and a coating layer covering the surface of the aluminum-based halide oxide solid electrolyte particles. The coating layer is made of a salt containing triphenyl carbocations or a salt containing triphenyl sulfide cations. Its cations have a three-conjugated aromatic ring structure, exhibiting excellent hydrophobicity. Simultaneously, under the driving force of acid-base reactions, the positively charged acidic groups in the coating layer fully react with the hygroscopic chloride anions in the material to generate a uniform and dense coating layer in situ, thereby improving the moisture resistance of the aluminum-based halide oxide solid electrolyte. Furthermore, this structure does not destroy the special viscoelastic physical properties inherent in the aluminum-based halide oxide solid electrolyte and exhibits high ionic conductivity.

To provide a compound having improved photocleavage activity and improved hydrolysis resistance.SOLUTION: A compound in which a silyl group represented by the following formula is introduced into a β - position of a carbocation of a photoexcited species: wherein R1a, R1b, and R1c are each independently an arbitrary hydrocarbyl group.SELECTED DRAWING: None

This invention relates to a method for esterifying alkyl aromatics and amides via benzylic radical polarity reversal, belonging to the field of compound preparation technology. This invention leverages the advantages of electrochemical anodic oxidation to anolylate benzylic C(sp) groups. 3 The amide attacks the carbocation to form an imine intermediate, which is then hydrolyzed to break the C–N bond, thus achieving the synthesis of benzyl esters. This invention avoids the use of transition metals, high temperatures, high pressures, and stoichiometric amounts of hazardous oxidizing and reducing agents, and establishes good functional group tolerance, expanding the range of substrates and providing a supplementary approach for the synthesis of benzyl esters under mild conditions.

The invention belongs to the technical field of catalysts, and particularly relates to a tungsten oxide / mesoporous zirconia supported ruthenium-based catalyst and a preparation method and application thereof. Compared with the prior art, the metal-acid bifunctional catalyst is constructed by loading the metal ruthenium on the tungsten oxide / mesoporous zirconium oxide, the metal ruthenium is used as a dehydrogenation site in the polyethylene hydrogenolysis reaction, an acidic site on the tungsten oxide / mesoporous zirconium oxide is responsible for forming carbocations, further cracking and isomerization are performed, and through the synergistic effect of the metal acid, the metal-acid bifunctional catalyst is obtained. The liquid product with high added value and carbon number in the diesel oil range is obtained, the isomerization degree is high, the selectivity of gas-phase products such as methane is low, and excessive consumption of hydrogen is avoided.

This invention belongs to the field of organic synthesis and relates to a method for preparing organosulfur ether compounds using photocatalysis. A disulfide compound 1 and tetrahydrofuran undergo a coupling reaction under the action of a base and a catalyst, and under ultraviolet light irradiation, to obtain organosulfur ether compound 3. This invention provides a novel method for preparing organosulfur compounds. Under light irradiation, a photocatalyst extracts hydrogen atoms from tetrahydrofuran to obtain alkyl radicals, which are then converted into carbocations through redox reactions. Simultaneously, the disulfide ether generates sulfur radicals under light irradiation, which produce sulfide anions under alkaline conditions. The sulfide anions and carbocations then undergo a coupling reaction to obtain sulfide compounds. The method provided by this invention is rationally designed, with mild reaction conditions, is environmentally friendly, and has low cost, achieving a yield of up to 91%. It provides a new method for the synthesis of organosulfur ether compounds and has promising industrial applications.

This invention relates to a method for preparing a catalyst for in-situ inhibiting lignin condensation during depolymerization under acidic conditions, and its application. The method uses nitrogen-doped lignin-derived porous carbon materials as a carrier, and introduces bimetallic active sites such as cerium and nickel by constructing a hierarchical porous structure using a template method. Under acidic conditions, waste polyethylene terephthalate (PET) undergoes ester bond cleavage under the action of the catalyst. The ethylene glycol generated in situ can interact with the highly active intermediate formed during lignin depolymerization, effectively "capping" the benzylic carbocation, thereby inhibiting the carbocation-induced C-C bond condensation reaction. This invention does not require the introduction of additional exogenous inhibitors and maintains a stable and continuous inhibitory effect under high-temperature acidic conditions. It provides a new technological paradigm for the synergistic resource utilization of mixed solid wastes and has significant scientific and application value in the fields of high-value biomass conversion and plastic recycling.

This invention relates to the field of synthetic chemistry, specifically disclosing a method for photoelectrochemically promoted synthesis of 7-carbonyl cholesterol. The method comprises the following steps: using cholesterol as a raw material, adding N-hydroxyphthalimide, an electrolyte, and a polar solvent to form a reaction system; irradiating the reaction system with light and applying an electric current to induce an oxidation reaction in the cholesterol; and after the reaction, separating and purifying the product by silica gel column chromatography to obtain 7-carbonyl cholesterol. This invention directly utilizes carbocation radicals generated online under photo / electrochemical promotion, which can directly generate 7-carbonyl cholesterol with singlet oxygen, reducing the generation of byproducts and eliminating the need for repeated purification operations. This allows for convenient and efficient production of pure 7-carbonyl cholesterol, significantly reducing synthesis costs and improving synthesis efficiency.

The invention discloses a method for performing < 14 > C analysis based on C < + > ions in a carbocation mass spectrometry device, and belongs to the technical field of nuclide analysis. The method comprises the following steps: eliminating C-H molecular ion interference by using a specific gas stripping target in a segmented stripping and charge exchange mode, forming C-ions through a non-metal gas charge exchange target, and obtaining high-strength C-ion current intensity by matching pre-focusing, post-focusing and magnet analysis; the current intensity of C < + > ions reaches 6-7 mA, and the current intensity of C <-> ions after charge exchange reaches 260 microamperes; the specific gas is any one or more of He gas, Ar gas and N2 gas, and the non-metal gas is any one or more of H2, CH4, C2H4 and C4H10. The flow intensity of C < + > generated by the ion source is several times higher than that of C < 2 + >, and the efficiency of generating C <-> through charge exchange by using C < + > and C < 2 + > ions is close, so that the efficiency of 14C analysis based on C < + > can be several times higher than that of using C < 2 + >.