M-COPA Compound Synthesis to Prevent Aldehyde Epimerization
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Solution Overview
Problem
The synthesis of M-COPA and its analogs is hindered by low yields due to epimerization at the aldehyde group, and there is a need for a more efficient production method.
Innovation Solution
A novel synthesis method involving specific steps such as asymmetric alkylation, reduction, oxidation, Mukaiyama Aldol reaction, Horner-Wadsworth-Emmons reaction, and intramolecular Diels-Alder reaction to produce a compound represented by formula (1), which includes alkyl, aryl, and heteroaryl groups, allowing high-yield production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the conventional synthesis method using intramolecular Diels-Alder reaction and Horner-Wadsworth-Emmons reaction is employed, then M-COPA can be produced, but the yield is lowered due to epimerization at the aldehyde group
Solution Approach 1:
The patent applies preliminary action by introducing a protecting group to the aldehyde group before performing the Horner-Wadsworth-Emmons reaction. This protective measure is taken in advance to prevent epimerization during the reaction process, ensuring the stereochemical integrity of the molecule and thereby improving production yield.
Solution Approach 2:
The patent uses a protecting group as an intermediary substance that temporarily modifies the aldehyde group to prevent unwanted side reactions. This intermediary approach allows the Horner-Wadsworth-Emmons reaction to proceed without causing epimerization, and the protecting group is subsequently removed to restore the original functional group.
2Ease of manufacture
If natural compounds from Trichoderma are used as raw materials, then M-COPA can be synthesized, but mass synthesis becomes difficult
Solution Approach 1:
The patent fundamentally changes the raw material parameter by replacing natural compounds from Trichoderma with synthetically accessible starting materials. This parameter change enables scalable mass synthesis while maintaining the ability to produce M-COPA, as synthetic raw materials can be more easily produced in large quantities compared to natural extraction.
3Shape
If a bulky group is present at the α position of the aldehyde group in compound c, then the molecule structure is formed, but hydrogen atom inversion causes epimerization and lowers yield
Solution Approach 1:
The patent applies preliminary action by introducing a protecting group to the aldehyde group before performing the Horner-Wadsworth-Emmons reaction. This protective measure is taken in advance to prevent epimerization during the reaction process, ensuring the stereochemical integrity of the molecule and thereby improving production yield.
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 enables the production of a novel compound with high efficiency, suitable for cancer treatment, and a pharmaceutical composition that inhibits receptor tyrosine kinase translocation, effective against various cancers including gastrointestinal stromal tumor and leukemia.
Implementation Method 1
cyclizing a compound represented by formula (7) through intramolecular Diels-Alder reaction
Implementation Method 2
subjecting a compound represented by formula (6) and a compound represented by formula (5) to Horner-Wadsworth-Emmons reaction
Implementation Method 3
reduction
Implementation Method 4
oxidized to give compound c
Data Source
AI summary
A compound represented by formula (1) below, useful for treating cancer. In the formula, R1 and R3-R8 each independently represents a hydrogen atom or an alkyl group, R2 represents a hydrogen atom or a group represented by —ORa, R9 represents a group represented by —C(O)NReRf, Ra, Re, and Rf each independently represents a hydrogen atom, an arylalkyl group that may have a substituent, or a heteroarylalkyl group. A production method that enables the compound to be produced with high efficiency, and a pharmaceutical composition containing the compound as an active ingredient