Indolinone Derivative Synthesis via Segmented Base Catalysis
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Solution Overview
Problem
Existing processes for manufacturing indolinone derivatives used in drug substances are inefficient, environmentally unfriendly, and not suitable for large-scale production, leading to lower yields and purity issues.
Innovation Solution
A new process involving specific reaction steps and solvents, such as high boiling aprotic solvents and base catalyzed dechloroacetylation, to synthesize intermediates like 'chlorimide', 'chlorenol', and 'enolindole' compounds, which are crucial for drug substance synthesis, offering higher yields, environmental friendliness, and robustness for large-scale production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing processes are used for manufacturing indolinone derivatives, then the process can be carried out, but the overall yield is low and the process efficiency is poor
Solution Approach 1:
The patent applies parameter changes by optimizing reaction conditions including conducting reactions at higher concentrations (improving yield), using specific temperature ranges (80-130°C for chlorimide formation, 100-140°C for chlorenol formation), and selecting appropriate solvents. These parameter optimizations directly address the low yield and efficiency problems of existing processes.
Solution Approach 2:
The manufacturing process is segmented into distinct reaction steps: (I) formation of chlorimide compound, (II) formation of chlorenol compound, and (III) formation of enolindole compound. Each step is independently optimized with specific conditions, allowing for better control and higher overall yield compared to undifferentiated existing processes.
2Object-affected harmful factors
If existing processes are used for manufacturing indolinone derivatives, then production can proceed, but the environmental impact is negative
Solution Approach 1:
The patent improves environmental friendliness by conducting reactions at higher concentrations, which reduces solvent usage and waste generation. The process uses environmentally acceptable solvents and optimizes reaction conditions to minimize harmful byproducts, directly addressing the environmental concerns of existing processes.
3Reliability
If existing processes are used for manufacturing indolinone derivatives, then the process can be executed, but it lacks robustness for large-scale production
Solution Approach 1:
The process is divided into three robust, independently controllable reaction steps with well-defined conditions. This segmentation allows each step to be optimized and controlled separately, making the overall process more reliable and suitable for large-scale production compared to less differentiated existing processes.
Solution Approach 2:
The patent establishes specific parameter ranges for each reaction step (temperatures, concentrations, reaction times) that ensure consistent results. This parameter optimization creates a robust process that is less sensitive to variations and more suitable for large-scale manufacturing.
4Manufacturing precision
If existing processes are used for manufacturing indolinone derivatives, then the synthesis can proceed, but the purity of the active pharmaceutical ingredient is insufficient
Solution Approach 1:
The synthesis is divided into three distinct steps, each producing a specific intermediate (chlorimide, chlorenol, enolindole) that can be isolated and purified. This segmentation allows for better control of purity at each stage, leading to higher overall purity of the final active pharmaceutical ingredient compared to less differentiated existing processes.
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 new process enhances overall yield, reduces environmental impact, and ensures high purity of the active pharmaceutical ingredient, making it more efficient and economically viable for large-scale production.
Implementation Method 1
base catalyzed dechloroacetylation of a compound of formula (II)
Implementation Method 2
high boiling aprotic solvents
Data Source
AI summary
The present invention relates to specific indolinone derivatives, namely the compounds of formula, in which R1 represents an hydrogen atom or a group, and R2 and R3 each represent an hydrogen atom or R2 and R3 taken together represent a group, with the proviso that when R1 represents an hydrogen atom R2 and R3 taken together represent a group, and to a process for their manufacture.