3-N-Cyclopropylmethyl-2-Fluorobenzamide Synthesis Under Mild Conditions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for synthesizing 3-N-cyclopropyl methyl meta-carboxamido benzamide derivatives suffer from low yields and require harsh conditions unsuitable for industrialization, such as low temperatures and the use of large quantities of organic bases.
Innovation Solution
A mild method for synthesizing 3-N-cyclopropylmethyl-2-fluorobenzamide compounds, which are intermediates for these derivatives, using milder reaction conditions and avoiding the need for extreme temperatures and excessive organic bases, resulting in higher yields and lower synthesis costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional synthesis methods are used to prepare 3-N-cyclopropyl methyl meta-carboxamido benzamide derivatives, then the reaction can proceed under conventional conditions, but the yield is low and harsh conditions are required
Solution Approach 1:
The patent changes the reaction parameters by using different solvents (DMF, DMSO, NMP) and bases (K2CO3, Cs2CO3, KF) with varying properties. Specifically, it modifies the basicity, solubility, and reaction temperature parameters to achieve higher yields under milder conditions compared to traditional methods that require -70°C and give low yields
Solution Approach 2:
The patent introduces intermediate compounds (3-N-cyclopropylmethyl-2-fluorobenzamide and related derivatives) as mediators in the synthesis pathway. These intermediates facilitate the reaction by providing stable structures that can be further transformed into the final product with high yield, avoiding the need for harsh conditions
2Ease of manufacture
If traditional synthesis routes are used, then the reaction can be performed with available reagents, but large quantities of organic bases are required
Solution Approach 1:
The patent changes the type and quantity of bases used in the reaction. Instead of requiring large quantities of organic bases, it employs inorganic bases (K2CO3, Cs2CO3, KF) in catalytic or stoichiometric amounts, significantly reducing organic base consumption while maintaining reaction efficiency and product yield
Solution Approach 2:
The patent replaces expensive and environmentally problematic organic bases with cheaper, more environmentally friendly inorganic bases. These inorganic bases can be easily removed and disposed of, reducing both cost and environmental impact compared to traditional organic base systems
3Ease of manufacture
If traditional synthesis methods are used, then the reaction can proceed with standard reagents, but the process is not environmentally friendly
Solution Approach 1:
The patent converts potentially harmful aspects of traditional synthesis into benefits by replacing toxic organic bases and harsh conditions with environmentally friendly inorganic bases and mild conditions. This transformation maintains process simplicity while eliminating harmful factors, making the synthesis greener and more sustainable
Solution Approach 2:
The patent creates a milder, more controlled reaction environment that reduces environmental impact. By using solvents and bases that are less harmful and by operating under milder conditions, the patent effectively creates a safer chemical environment that maintains reaction efficiency while reducing ecological footprint
Data Source
AI summary
Disclosed are a 3-N-cyclopropylmethyl-2-fluorobenzamide compound, a preparation method therefor and the use thereof. The compound has a structure as represented by the following formula I. This compound can be used for the preparation of an m-diamide compound substituted with a 3-N-cyclopropylmethyl derivative. The m-diamide compound substituted with the 3-N-cyclopropylmethyl derivative, when serving as an insecticide, has the characteristics of a good fast-acting property, needing to use a low amount thereof, and being more beneficial for environmental protection. The 3-N-cyclopropylmethyl-2-fluorobenzamide compound is easy to synthesize and has mild conditions, and when used for preparing a m-diamide compound insecticide substituted with a 3-N-cyclopropylmethyl derivative, same is easy to synthesize and has a low synthesis cost and a high yield.