3 results about "Copper(I) bromide" patented technology

This invention relates to the field of organic synthetic chemistry, specifically to a polysubstituted furan compound and its synthetic method, wherein the method comprises... β Using ketone sulfones and olefins as starting materials, polysubstituted furans are synthesized via a [3+2] cycloaddition reaction in the presence of a copper catalyst and an oxidant. This invention employs cuprous bromide as the catalyst and di-tert-butyl peroxide (DTBP) as the oxidant, reacting in dimethyl sulfoxide solvent at 100°C–130°C for 6–24 h. This method offers advantages such as high atom and step economy, broad substrate applicability, good functional group tolerance, excellent position selectivity, and high yield, with a maximum yield reaching 84%. It is suitable for large-scale synthesis and provides a new strategy for the synthesis of furans in medicinal chemistry and materials science.

The invention discloses a preparation method of copper nanocluster photocatalysts with different atomic accuracies in the technical field of photocatalysis, which comprises the following steps: firstly, respectively synthesizing two copper nanoclusters NCs, taking cuprous bromide as a raw material, reacting with 4-mercaptobenzoic acid and 2-chloro-4-fluorothiophenol, reducing by sodium borohydride, recrystallizing to prepare Cu13 NCs, and preparing the Cu13 NCs into copper nanoclusters with different atomic accuracies. The preparation method comprises the following steps: firstly, preparing Cu13 NCs, reacting Cu13 NCs with diphenyl-2-pyridine phosphine, reacting tetrafluoroborate (acetonitrile) copper with diphenyl-2-pyridine phosphine and cyclohexanol, reducing, recrystallizing to obtain Cu28 NCs, secondly, preparing bulk-phase black phosphorus (BP) through high-temperature calcination of red phosphorus, tin powder and iodine elementary substance, grinding, ultrasonically stripping and freeze-drying to obtain BP nanosheets, and finally, respectively dissolving Cu13 NCs and Cu28 NCs in dichloromethane, respectively mixing with a BP solution, and carrying out vacuum drying to obtain the Cu13 NCs / Cu28 NCs composite material. The metal cluster photocatalyst prepared by the preparation method disclosed by the invention is excellent and stable in photocatalytic reduction performance, and the Cu13 NCs / BP and Cu28 NCs / BP composite materials are finally prepared through ultrasonic treatment and freeze drying.

The invention provides a preparation method of 5-bromo-1H-1, 2, 4-triazole, which comprises the following steps: taking a compound 3-amino-1H-1, 2, 4-triazole-5-carboxylic acid as a raw material, carrying out diazotization reaction to obtain a corresponding diazonium salt solution, and reacting the diazonium salt under the action of cuprous bromide to obtain the compound 5-bromo-1H-1, 2, 4-triazole. According to the method disclosed by the invention, the compound 5-bromo-1H-1, 2, 4-triazole is finally prepared with low cost, short steps, simple operation, relatively mild reaction conditions and ideal yield, and a potential route is provided for large-scale production of the 5-bromo-1H-1, 2, 4-triazole.