Nucleoside Analog Production via Trimethylsilylation
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Solution Overview
Problem
Existing methods for producing nucleoside analogs as intermediates for oligonucleotide synthesis have low reaction yields, particularly when using nucleobases like 2-isobutyrylamino-6-hydroxypurin-9-yl or 6-benzoylaminopurin-9-yl, making them industrially unsatisfactory.
Innovation Solution
A production method involving the reaction of a trimethylsilylated compound with another compound in the presence of a Lewis acid catalyst, using specific protective groups to improve yield, regardless of the nucleobase type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional production methods are used for nucleoside analogs with specific nucleobases, then the production process is simple, but the reaction yield is low
Solution Approach 1:
The patent applies preliminary action by introducing a trimethylsilyl group onto the nucleobase before the main coupling reaction. This pre-modification of the nucleobase with a silyl group facilitates subsequent reactions and significantly improves the reaction yield of nucleoside analog production, particularly for challenging nucleobases like 2-isobutyrylamino-6-hydroxypurin-9-yl and 6-benzoylaminopurin-9-yl
Solution Approach 2:
The patent uses a silyl-protected intermediate compound as a mediator in the production process. The trimethylsilyl group acts as an intermediary that temporarily modifies the nucleobase, enabling more efficient coupling reactions with the sugar moiety. This intermediate approach resolves the low yield problem without requiring complex alternative production methods
2Productivity
If existing production methods are used, then the process is straightforward, but the yield is unsatisfactory for industrial production
Solution Approach 1:
The patent applies parameter changes by modifying the chemical parameters of the nucleobase through silylation. By changing the physical-chemical properties of the nucleobase (introducing electropositive silyl groups), the reaction efficiency and yield are significantly improved while maintaining reasonable manufacturing simplicity
3Productivity
If no silyl protective group is used, then the synthesis steps are fewer, but the reaction yield is low regardless of nucleobase type
Solution Approach 1:
The patent systematically applies preliminary silylation action to the nucleobase before coupling with the sugar component. This pre-preparation step, while adding a procedure step, ensures high reaction yields across different nucleobase types and simplifies the overall synthesis by enabling more efficient subsequent reactions
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
This method achieves high yields for nucleoside analogs, enabling the production of oligonucleotides with stable antisense or antigene activity and effective detection or amplification capabilities.
Implementation Method 1
reacting a trimethylsilylated compound with a compound represented by the general formula (II) in the presence of a Lewis acid catalyst
Data Source
AI summary
A compound represented by the general formula (III) which serves as an intermediate of an oligonucleotide analog having stable and excellent antisense or antigene activity or having excellent activity as a detection reagent (probe) for a specific gene or as a primer for the initiation of amplification of a specific gene can be produced at high yields regardless of the type of nucleobase by a method comprising reacting a compound represented by the general formula (II) or a salt thereof with a trimethylsilylated compound obtained from a compound represented by the general formula (IVb), wherein X, Y, Z, A, R, and B are as defined in claim 1.