A process for preparing 4-methyl-2-propan-2-yl-pyridine-3-carbonitrile
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Solution Overview
Problem
There is a need for an efficient, scalable, and cost-effective process to manufacture 4-methyl-2-propan-2-yl-pyridine-3-carbonitrile (Compound A), a synthetic intermediate in the production of the KRAS G12C inhibitor sotorasib, which is currently hindered by high raw material costs and the use of hazardous solvents and specialized equipment in existing synthetic routes.
Innovation Solution
A [3+3] cycloaddition process involving Compound B or its salt and crotonaldehyde in the presence of an acid catalyst or organocatalyst, or a combination thereof, to form Compound A with high yield and purity, avoiding halogenated solvents and chromatography, and reducing the number of synthesis steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing synthetic routes are used to manufacture Compound A, then the compound can be produced, but high raw material costs and hazardous solvents are required
Solution Approach 1:
The patent changes the reaction parameters by using a catalytic system (metal catalyst with ligand) to enable the reaction to proceed under milder conditions, avoiding hazardous solvents while maintaining high yield and purity of Compound A
Solution Approach 2:
The patent introduces a catalytic intermediary system consisting of a metal catalyst and ligand that facilitates the formation of Compound A from simpler, safer starting materials, eliminating the need for hazardous solvents in the process
2Productivity
If existing synthetic routes are used to manufacture Compound A, then the compound can be produced, but specialized equipment and multiple steps are required
Solution Approach 1:
The patent segments the synthesis process into a single step using a catalytic system, eliminating the need for multiple steps and specialized equipment while maintaining high productivity and purity of Compound A
Solution Approach 2:
The catalytic system serves multiple functions simultaneously: it catalyzes the formation of Compound A, enables mild reaction conditions, and eliminates the need for specialized equipment, thereby improving productivity while reducing device complexity
3Quantity of substance
If conventional synthesis methods are used, then Compound A can be obtained, but high raw material costs and minimal scalability are observed
Solution Approach 1:
The patent changes the reaction parameters by using a catalytic system that maintains high yield at scale, enabling the process to be scaled up while maintaining cost-effectiveness and productivity
Solution Approach 2:
The catalytic intermediary system enables scalable synthesis by facilitating efficient reactions that can be scaled up without compromising yield or increasing raw material costs, making the process both high-yielding and manufacturable at large scale
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 process provides Compound A in high yield and purity with minimal side products, reducing raw material costs and environmental impact, and is suitable for large-scale synthesis of sotorasib intermediates.
Implementation Method 1
in the presence of a catalytic reagent to form Compound A, wherein the catalytic reagent comprises an acid catalyst, an organocatalyst, or a combination thereof
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
Provided herein are processes for preparing Compound A or a salt thereof, comprising admixing Compound B or a salt thereof and crotonaldehyde in the presence of an acid catalyst and a solvent to form Compound A