2results about How to "Resolve source issues" patented technology

The utility model relates to the field of environmental protection machinery device, concretely relates to a small pure electricity high -level self -loading and unloading garbage collection car hydraulic system device, including having auxiliary frame, being provided with garbage bin on the auxiliary frame, the front end of auxiliary frame is provided with the installation and has power unit assembly and pressure relay, still including have the lifting oil cylinder, the lifting oil cylinder is installed between auxiliary frame and the lifting arm, and the turnover oil cylinder is installed between the lifting arm and fixed frame, and the hanging bucket oil cylinder is fixedly installed between fixed frame and the hanging bucket frame, still including have the whole car support oil cylinder, the whole car support oil cylinder has two, is installed respectively in the left and right two ends of auxiliary frame, and the pressure relay and hydraulic oil pipe are connected with power unit and the whole car support oil cylinder respectively, solve the operator when clamping garbage can of present stage not completely clamping, just lifting lifting mechanism, or lifting mechanism not falling in place just lifting garbage can and cause the interference before garbage can and lifting mechanism, cause the problem of deformation even scrap.

This invention relates to a method for synthesizing 1-cyclopropyl-4-oxo-7-fluoro-8-methoxy-1,4-dihydroquinoline-3-carboxylic acid, a key intermediate for numonoxacin. The method uses 2,4-difluoro-3-methoxyacetophenone as a starting material and proceeds through four steps: haloform reaction, acyl chloride formation and Maxwell's acid condensation, reaction with dimethylformamide dimethyl acetal and cyclopropylamine, and base-catalyzed cyclization and acid deprotection. This efficient method yields the target intermediate. The synthetic route of this invention utilizes readily available raw materials, mild reaction conditions, and simple operation. The multi-step reaction can be carried out in a one-pot process, achieving a total conversion rate of approximately 85% and a product purity exceeding 99.5%, making it suitable for industrial production.