Aryltriazole Synthesis via Copper Catalysis
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Solution Overview
Problem
Current methods for producing 3-(1H-1,2,4-triazol-1-yl)phenyl sulfide compounds, used as insecticides and miticides, are not efficient and require complex processes.
Innovation Solution
A series of steps involving the reaction of a triazole compound with phenylboronic acid or phenylboroxine in the presence of a copper compound, followed by conversion of an electron withdrawing group into an alkyl group and reaction with a halosulfonylating agent, to produce 3-(1H-1,2,4-triazol-1-yl)phenyl sulfide compounds under mild conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current methods are used to produce 3-(1H-1,2,4-triazol-1-yl)phenyl sulfide compounds, then the compounds can be produced, but the production process is inefficient and complex
Solution Approach 1:
The production process is divided into distinct sequential steps: (1) reacting triazole compound with phenylboronic acid/phenylboroxine in presence of copper compound to form intermediate, (2) converting electron withdrawing group to alkyl group, (3) reacting with halosulfonylating agent to form sulfonyl halide, and (4) reducing to final sulfide product. This segmentation allows each step to be optimized independently, improving overall efficiency while maintaining manageable complexity.
Solution Approach 2:
The patent introduces several intermediate compounds in the synthesis pathway, including the initial coupling intermediate from copper-catalyzed reaction, the sulfonyl halide intermediate, and the mercaptan intermediate. These intermediates serve as stable, isolable stages that facilitate efficient production and allow for quality control, resolving the contradiction between productivity and process complexity.
2Ease of manufacture
If current methods are used to produce 3-(1H-1,2,4-triazol-1-yl)phenyl sulfide compounds, then the compounds can be produced, but special reaction equipment is required
Solution Approach 1:
The reaction conditions are designed to proceed under mild, self-sufficient conditions without requiring specialized equipment. The copper-catalyzed coupling occurs in standard reaction vessels, the electron withdrawing group conversion uses conventional heating, the halosulfonylating reaction proceeds in standard equipment, and the reduction step uses common reducing agents. This makes the entire process accessible to standard manufacturing facilities.
3Manufacturing precision
If current methods are used to produce 3-(1H-1,2,4-triazol-1-yl)phenyl sulfide compounds, then the compounds can be produced, but selectivity is not high
Solution Approach 1:
The patent employs specific parameter optimizations to achieve high selectivity: using copper compounds as catalysts at controlled concentrations, selecting appropriate solvents for each reaction step, controlling temperature ranges for optimal conversion, and choosing specific reducing agents. These parameter changes ensure high selectivity for the desired sulfide product while maintaining efficient production rates.
Solution Approach 2:
The use of well-defined intermediate compounds with specific functional groups (electron withdrawing groups, sulfonyl halide groups, mercaptan groups) ensures high selectivity at each transformation step. Each intermediate is designed to react selectively with the intended reagent, minimizing side reactions and maximizing productivity of the desired product.
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 allows for the easy and efficient production of 3-(1H-1,2,4-triazol-1-yl)phenyl sulfide compounds with high selectivity, suitable for use as insecticides and miticides, without the need for special equipment.
Implementation Method 1
reacting a triazole compound with a phenylboronic acid compound or a phenylboroxine compound in the presence of a catalytic amount of a copper compound
Implementation Method 2
reacting the resulting compound with a halosulfonylating agent, and further reducing the resulting sulfonyl halide compound
Data Source
AI summary
[PROBLEMS] To provide: an aryl (1H-1,2,4-triazol-1-yl) compound which is useful for producing a 3-(1H-1,2,4-triazol-1-yl)phenylsulfide compound (a compound useful as an insecticide or the like) efficiently and in a simple manner; and a process for producing the compound. [MEANS FOR SOLVING PROBLEMS] Disclosed are: an aryl (1H-1,2,4-triazol-1-yl) compound represented by the general formula (1) [wherein R represents a C1-C6 alkyl group or a cyclic C1-C6 alkyl group; A1 represents a hydrogen atom, an amino group, a mono(C1-C6 alkyl)amino group or a di(C1-C6 alkyl)amino group; A2 represents a halogen atom, a C1-C6 alkyl group or a cyclic C1-C6 alkyl group; and Z represents a hydrogen atom, a halosulfonyl group or a mercapto group]; and a process for producing the compound (1).