Synthetic Process for Antibacterial Compound via Segmentation
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Solution Overview
Problem
There is a need for improved synthetic processes and new synthetic intermediates to prepare commercial quantities of a specific antibacterial compound, as existing methods are not cost-effective or environmentally acceptable.
Innovation Solution
The development of synthetic processes and intermediates involving reactions between phenols, chlorides, amino pyridines, nitro pyridines, benzyl ethers, and acid chlorides to produce the compound, utilizing various solvents and conditions to optimize yields and reduce environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing synthetic processes are used to prepare the antibacterial compound, then the compound can be produced, but the process is not cost-effective and not environmentally acceptable
Solution Approach 1:
The patent applies parameter changes by modifying reaction conditions including temperature ranges (20-40°C), solvent selection (ethyl acetate, methyl tert-butyl ether, dichloromethane), and pH control (adjusting to 2-3 with HCl). These parameter optimizations improve both cost-effectiveness and environmental acceptability of the synthesis process
Solution Approach 2:
The patent employs readily available, inexpensive reagents and solvents that can be easily disposed of or recycled. Common chemicals like HCl, NaOH, and standard organic solvents are used instead of expensive or hazardous materials, making the process both cost-effective and environmentally friendly
2Productivity
If existing synthetic processes are used to prepare the antibacterial compound, then the compound can be produced, but the process is not suitable for commercial quantities
Solution Approach 1:
The patent divides the synthesis into distinct sequential steps: (1) formation of intermediate compound of formula (II) from compound of formula (I), (2) conversion to compound of formula (III), (3) conversion to compound of formula (IV), and (4) final conversion to compound of formula (V). This segmentation allows each step to be optimized independently for commercial-scale production
Solution Approach 2:
The patent performs preliminary actions by preparing and characterizing multiple intermediates (formulas II, III, IV) before reaching the final product. This staged approach allows for quality control and process optimization at each step, ensuring the overall process is feasible for commercial production
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the cost-effective and environmentally acceptable production of commercial quantities of the antibacterial compound, facilitating its commercial development.
Implementation Method 1
reacting a phenol of formula e with a chloride of formula h to provide the compound of formula (I)
Implementation Method 2
reacting the amino pyridine of formula g with chloroacetic acid to provide the chloride of formula h
Implementation Method 3
converting a nitro pyridine of formula f to the amino pyridine of formula g
Implementation Method 4
reacting 2-chloro-3-nitro-5-(trifluoromethyl)pyridine with thiourea to provide the nitro pyridine of formula f
Implementation Method 5
deprotecting the corresponding benzyl ether of formula d to provide the phenol of formula e
Implementation Method 6
coupling an acid chloride of formula i or a salt thereof with an amide of formula c to provide the benzyl ether of formula d
Implementation Method 7
converting an acid of formula b to the amide of formula c
Data Source
AI summary
The invention provides synthetic processes and synthetic intermediates that can be used to prepare a compound of formula (I): or a salt thereof.