5 results about "Isocyanide compound" patented technology

The invention discloses a phenanthridine-6-formaldehyde derivative and a preparation method and application thereof.The preparation method comprises the steps that 2, 4, 5, 6-tetra (9-carbazolyl)-isophthalonitrile serves as a photocatalyst, 1-azabicyclo [2.2. 2] octane serves as a hydrogen atom transfer catalyst, a biphenyl isocyanide compound, the photocatalyst, the hydrogen atom transfer catalyst and an alkali additive are jointly dissolved in 1, 3-dioxolane, the mixture is stirred to be uniform, and the phenanthridine-6-formaldehyde derivative is obtained. And carrying out free radical tandem cyclization and acid-catalyzed hydrolysis reaction to obtain the phenanthridine-6-formaldehyde derivative. The invention also provides a specific reaction equation. According to the developed synthesis method of the phenanthridine-6-formaldehyde derivative, the compound can be efficiently and conveniently prepared, the technical bottlenecks of harsh reaction conditions and tedious steps in a traditional process are successfully overcome, raw materials which are low in price and easy to obtain are adopted, operation is carried out under mild conditions, the synthesis method has the outstanding advantages of being high in yield, safe and simple to operate, environmentally friendly and the like, and the method is suitable for industrial production. Good industrial application potential is shown.

This invention belongs to the field of mineral processing collector technology, specifically relating to a collector for ilmenite flotation, its preparation method, and its application. The collector comprises a composite collector, a nonionic surfactant, a fatty acid, and a composite inhibitor; the composite inhibitor is composed of modified carboxymethyl cellulose and nano-cerium dioxide; the preparation method of the modified carboxymethyl cellulose is as follows: carboxymethyl cellulose is activated in a dielectric barrier discharge cold plasma device to obtain activated carboxymethyl cellulose; the activated carboxymethyl cellulose is dissolved in water to obtain a carboxymethyl cellulose solution, and then dihydroxyacetone and cyclohexyl isocyanate are added sequentially to the solution and stirred to obtain modified carboxymethyl cellulose. The composite collector and composite inhibitor of this invention work synergistically to improve the grade of titanium concentrate and increase the recovery rate, exhibiting strong collecting ability and good selectivity, and can be used for large-scale production.

Disclosed is a compound of formula (I) or (II) 1 , Y 2 and Y 3 CR 1 or N]. Such compounds are used as antibiotics and antifungals.

We report the synthesis, characterization, and catalytic activity of a family of thermally stable dinuclear Ni(I) complexes supported by commercially available isocyanides as a general solution to this problem. Two classes of Ni(I) isocyanide complexes showing high thermal and solid-state stability have been developed – coordinatively saturated homoleptic compounds and coordinatively unsaturated Ni(I)-halide compounds. The Ni(I) compounds exhibit rapid ligand substitution and are efficient catalysts in Kumada, Suzuki-Miyaura, and Buchwald-Hartwig cross-coupling reactions, suggesting their potential use as either Ni(I) catalysts or pre-catalysts. In addition, bromide-selective functionalization of polyhalogenated arenes with Grignard reagents was achieved for the first time under nickel catalysis. Finally, spectroscopic and mechanistic studies were performed to establish the general use of simple isocyanide ligands as spectator ligands for cross-coupling reactions, representing an untapped chemical space for new reaction discovery.

The application provides a polysiloxane containing a side group of an alpha-amidoamide structure and a preparation method and application thereof, the polysiloxane is prepared from a polysiloxane containing a carboxyl side group, a primary amine, a monohydric aldehyde and an isocyanide compound, has a linear structure with a side group of an alpha-amidoamide, the side group includes aliphatic and aromatic groups and the like, and the structure is unique, the polysiloxane containing the side group of the alpha-amidoamide structure can be further crosslinked into a polar organosilicon elastomer as a prepolymer, the glass transition temperature and the dielectric constant of the organosilicon elastomer are obviously improved, meanwhile, the organosilicon elastomer has excellent mechanical properties, has a good application prospect, and further widens the application range of the polysiloxane.