Purifying Compound II via Ketone Reaction and Hydrolysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing 6-amino-7-fluoro-2H-1,4-benzoxazin-3(4H)-one compounds result in products with low purity, typically ranging from 80% to 95%, which is not sufficient for high-quality herbicide intermediates.
Innovation Solution
A method involving the reaction of a crude compound (II) with a ketone compound in the presence of an acid, followed by filtration and reaction with water, to produce a purified compound (II) with a purity of 96% or higher, utilizing specific alkyl, alkenyl, and alkynyl groups, and halogen atoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce compound (II), then the production process is simple, but the purity of the product is low (80-95%)
Solution Approach 1:
The production process is divided into multiple distinct stages: (1) forming compound (I) from crude compound (II) with ketone and acid, (2) filtering the reaction mixture to remove solids, (3) reacting the filtrate with water to regenerate compound (II), and (4) isolating the purified product. This segmentation allows each step to be optimized for its specific function, achieving high purity through systematic separation of impurities at different stages.
Solution Approach 2:
Compound (I) serves as an intermediary form that temporarily holds the target molecule in a purified state. By converting crude compound (II) to compound (I) through reaction with ketone and acid, impurities are left behind in the solid phase during filtration. The intermediary compound (I) can then be cleanly converted back to compound (II) by water treatment, ensuring high purity in the final product.
2Manufacturing precision
If multiple purification steps are added to increase purity, then the purity of compound (II) increases, but the production time and complexity increase
Solution Approach 1:
Multiple purification functions are merged into a single filtration step. By designing the process so that impurities, excess reagents, and byproducts all become solid or removable components during the first filtration, the method achieves comprehensive purification in one operation rather than requiring multiple separate purification steps. This merging maintains high purity while minimizing time loss.
Solution Approach 2:
The process utilizes parameter changes in the chemical system to facilitate purification. By adjusting pH through acid addition and utilizing solubility differences at different stages, the method enables impurities to be selectively removed. The transformation between compound (II) and compound (I), and back to (II) with water, represents a parameter change that drives purification without requiring extensive additional processing time.
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
The method significantly increases the purity of the compound (II) to 96% or more, meeting the requirements for high-quality herbicide intermediates.
Implementation Method 1
reacting the obtained reaction mixture containing the compound represented by the formula (I) with water
Data Source
AI summary
A method for producing a purified compound represented by the formula (II), comprising; obtaining a reaction mixture containing a compound represented by the formula (I) from a crude compound represented by the formula (II) such as reacting the crude compound with a ketone compound, and reacting the obtained reaction mixture or a solution by filtering thus obtained reaction mixture containing the compound represented by the formula (I) with water.