Fluorine-Containing Pyrimidine Compounds with Controlled 4,6-Substitution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluorine-containing pyrimidine compounds face challenges in introducing substituents at the 4- and 6-positions of the pyrimidine ring and a pyridine ring at the 2-position, limiting their potential biological activities such as bactericidal, insecticidal, and herbicidal effects.
Innovation Solution
Development of fluorine-containing pyrimidine and pyrimidinone compounds with specific substituents at the 4- and 6-positions of the pyrimidine ring and a pyridine ring at the 2-position, utilizing nucleophilic and electrophilic reactions to introduce these substituents, and producing them through improved methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-containing pyrimidine compounds with substituents at 4- and 6-positions and a pyridine ring at the 2-position are synthesized, then biological activities such as bactericidal, insecticidal, and herbicidal effects are enhanced, but the synthesis process becomes complex and difficult to control due to reactivity and selectivity issues
Solution Approach 1:
The synthesis is divided into multiple steps: first forming the core pyrimidine structure with fluorine and pyridine substituents, then separately introducing groups at the 4- and 6-positions. This segmentation allows control of each transformation step independently, managing the overall complexity while achieving the target molecule with enhanced biological activity.
Solution Approach 2:
The patent employs preliminary protection of reactive positions and pre-formation of stable intermediates before introducing the final substituents. By preparing the core structure with fluorine and pyridine groups first, and then sequentially adding 4- and 6-position substituents under controlled conditions, the synthesis achieves both complexity management and high biological activity.
2Adaptability or versatility
If multiple substituents are introduced at different positions of the pyrimidine ring, then the compound's biological potential is improved, but the manufacturing process becomes less efficient and more difficult to control
Solution Approach 1:
The patent applies different synthesis strategies to different positions of the pyrimidine ring based on their specific requirements. The 2-position pyridine group and 5-position fluorine are introduced first as they form the core, while the 4- and 6-position substituents are added subsequently using position-specific reaction conditions. This localized approach optimizes both biological potential and manufacturing feasibility for each position.
Solution Approach 2:
The synthesis utilizes parameter changes in reaction conditions (temperature, solvent, catalysts) to control the introduction of different substituents at different positions. By adjusting these parameters for each step, the process achieves high versatility for biological applications while maintaining reasonable manufacturing efficiency through optimized conditions for each transformation.
Data Source
AI summary
A fluorine-containing pyrimidine compound is provided represented by general formula (1), (2), or (3):wherein: W and X each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, —CnF2n+1 where n is an integer of 1 to 10, a nitro group, —OA1, —SOmA1, —SA1, —NA1A2, —B(OA1)(OA2), —COA1, —COOA1, or —CONA1A2; Y represents a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, —CnF2n+1 where n is an integer of 1 to 10, a cyano group, a nitro group, —OA1, —SOmA1, —SA1, —NA1A2, —B(OA1)(OA2), —COA1, —COOA1, or —CONA1A2; Z represents a halogen atom or —OA3; A1 and A2 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; and A3 represents a hydrocarbon group having 1 to 12 carbon atoms.