6 results about "Phenyl isothiocyanate" patented technology

The application provides an intermediate of a tunicamycin derivative and a synthesis method of the intermediate. The method provided by the application directly protects an amino group of prodigiosin B with phenyl isothiocyanate, then protects a hydroxyl group (a thiourea group is simultaneously subjected to an alkylation reaction), and obtains an intermediate compound with a brand-new structure, then performs a photocatalytic ring-closing reaction, then protects a 5-hydroxyl group, and finally obtains a target compound through a simple Edman degradation reaction. Compared with the prior art, the method has a short reaction route and a significantly improved yield.

The invention discloses a thiourea acylthiourea metal complex catalyst, a preparation method thereof and application of the thiourea acylthiourea metal complex catalyst in lactide ring-opening polymerization. The preparation method comprises the following steps: (1) condensing 3, 5-bis (trifluoromethyl) phenyl isothiocyanate and para aminobenzoic acid in dichloromethane to obtain a carboxyl-containing product A; (2) performing acylating chlorination on the product A to obtain an intermediate B; (3) reacting the intermediate B with ammonium thiocyanate to generate an isothiocyanate intermediate C; (4) reacting the intermediate C with chiral primary amine to obtain a ligand intermediate D with a chiral center; and (5) coordinating the ligand intermediate D with a zinc compound or a titanium compound in an organic solvent to obtain the target catalyst. Molecules of the catalyst contain a chiral thiourea unit and an acylthiourea metal chelating unit at the same time, so that a monomer and an initiator can be activated synergistically. When being used for ring opening polymerization of lactide, the polylactic acid with high stereoregularity and narrow molecular weight distribution can be efficiently prepared at room temperature; the carbon nanotubes are added into a reaction system, so that the polylactic acid composite material with conductivity can be obtained.

This invention discloses an electrolyte, a supercapacitor, and their application in wind power energy storage based on a silicon-sulfur synergistic multifunctional electrolyte additive, belonging to the field of supercapacitor technology. The additive is composed of 4-(triethoxysilyl)phenyl isothiocyanate and diphenylphosphimide in a mass ratio of (0.4~1.2):(0.3~0.9). Through the efficient acid removal of the isothiocyanate group, the chemical anchoring of the siloxane group, and the stabilizing effect of the phenyl conjugation, it synergizes with the flame retardant and ion transport regulation functions of the phosphorimide to construct a stable interface with high temperature resistance and high ion conductivity. The electrolyte contains the additive, a composite lithium salt (LiPF6 / LiFSI / LiPO2F2), a five-element functional solvent (FEC / EC / PC / DEC / EMC), and auxiliary film-forming components (VC / DTD / PST), which synergistically solve the problems of acid corrosion, interface instability, and solvent decomposition at high temperatures. The supercapacitor exhibits low free acidity and high capacity retention after 28 days of storage at 55°C, high capacity retention after 350 high-temperature cycles, and short self-extinguishing time, meeting the high reliability requirements of extreme operating conditions such as wind power energy storage.

According to the application of the 2-ethyoxyl phenyl isothiocyanate in old lithium ion battery capacity repair and the application of the 2-ethyoxyl phenyl isothiocyanate in lithium ion battery electrolyte, the 2-ethyoxyl phenyl isothiocyanate provided by the invention can effectively improve the discharge capacity retention ratio of the lithium ion battery, so that the cycle performance of the lithium ion battery is improved; by adding the 2-ethyoxyl phenyl isothiocyanate or the electrolyte containing the 2-ethyoxyl phenyl isothiocyanate, the discharge capacity of the old lithium ion battery is improved, the attenuation speed of the lithium ion battery is reduced, and the old lithium ion battery is reused.

The invention belongs to the technical field of synthesis of imine derivatives. The invention discloses a method for preparing a thiazolidine-2-imine derivative, which comprises the following steps: adding N-methylallylamine and phenyl isothiocyanate into an electrolytic tank, and introducing direct-current constant current to react to obtain the thiazolidine-2-imine derivative. The method provided by the invention has multiple advantages of mild conditions, simple system, greenness, environmental protection and the like. The reaction can be smoothly carried out at normal temperature, the current is used as an intangible oxidant, a strong oxidant or a metal catalyst does not need to be additionally added, the safety is high, the operation is convenient, and the cost and environmental burden can be reduced. The electrochemical process is accurately regulated and controlled in a constant current mode, side reaction can be effectively inhibited, high-selectivity cyclization conversion is carried out on isothiocyanate and allylamine, the obtained target product is stable in yield and high in purity, post-treatment can be completed only through conventional extraction and purification, and process amplification and batch preparation are facilitated.

This application discloses a method for the simultaneous detection of florfenicol and florfenicolamine. After spiked with florfenicol-D3 and florfenicolamine-D3, the sample is derivatized using phenyl isothiocyanate. Quantitative analysis is then performed using an internal standard method combined with ultra-high performance liquid chromatography-tandem quadrupole time-of-flight mass spectrometry (UHPLC-QTS-MS / MS). This method enables the simultaneous detection of florfenicol and florfenicolamine in negative ion mode, achieving detection limits of 0.5 μg / kg and quantitation limits of 1.0 μg / kg for both. The method offers rapid analysis and high sensitivity, providing a novel technical means for the detection of florfenicol and its metabolite florfenicolamine.