2 results about "P-nitroanisole" patented technology

The application discloses a kind of light-driven solid nitroaromatics spontaneous hydrogen transfer amination method, it is related to organic synthesis technical field, comprising the following steps: step one: weighing solid p-nitroanisole, according to certain amount of proportion, 4,4'-dipyridyl and B2 (OH) 4 are sequentially added to corresponding amount of p-nitroanisole.The application is combined by using the method of photocatalysis and solid phase catalysis method, photocatalysis and solid phase catalysis method are combined, the best reaction duration, the best illumination condition that can convert nitro group into amino group are screened out to p-nitroanisole as substrate, and the best reaction ratio of p-nitroanisole and B2 (OH) 4 and 4,4'-dipyridyl, i.e.the scheme does not need combustible hydrogen, high pressure equipment or metal catalyst, and also does not need the participation of solid state catalytic reaction of organic solvent, using light source catalysis, nitroaromatics containing sensitive groups such as N heterocycle, halogen, aldehyde group, alkynyl, conjugated group can obtain product with higher yield.

The application provides a Ce-modified low-loading Pt Pt / gamma-Al2O3 catalyst and a preparation method and application thereof, and belongs to the field of catalysts.The method comprises the following steps: S1, adding deionized water to Al(OH)3 powder, and then performing drying and extrusion into a strip to obtain a strip-shaped Al(OH)3; S2, performing first calcination on the strip-shaped Al(OH)3 to obtain a gamma-Al2O3 carrier with a set particle size; S3, immersing the gamma-Al2O3 carrier in a cerium nitrate aqueous solution, and then performing drying and second calcination to obtain a Ce-modified gamma-Al2O3 catalyst; and S4, immersing the Ce-modified gamma-Al2O3 catalyst in a chloroplatinic acid aqueous solution, and then performing drying and third calcination to obtain a Ce-modified Pt / gamma-Al2O3 catalyst. The method improves the catalytic performance of a fixed-bed catalyst in a reaction of preparing p-aminoanisole by catalytically hydrogenating p-nitroanisole.