Boron-Based Synthesis of Diphenylmethane SGLT Inhibitor Intermediates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for preparing diphenylmethane derivatives as SGLT inhibitors face challenges due to the use of heavy metals like pyridinium chlorochromate, require separate Grignard reagent preparation, and generate related substances that complicate the process, increasing costs and safety management burdens.
Innovation Solution
A method for synthesizing a diphenylmethane derivative intermediate that avoids the use of Grignard reagents and heavy metals by reacting specific compounds under controlled conditions, including the use of oxalyl halides and deoxygenation steps, to minimize related substance generation and simplify the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the method using pyridinium chlorochromate and Grignard reagent is used, then the diphenylmethane derivative can be synthesized, but heavy metals are used and safety management burden increases
Solution Approach 1:
The patent removes heavy metals (pyridinium chlorochromate) and Grignard reagents from the synthesis process, replacing them with a boron-based method that uses compound (I) and boron trifluoride etherate in a simplified one-pot reaction, thereby eliminating harmful heavy metal usage while maintaining synthesis feasibility
Solution Approach 2:
The patent replaces expensive and hazardous heavy metal reagents with cheaper, safer boron-based reagents that can be easily disposed of or recycled, reducing both cost and safety management burden while achieving the same synthetic transformation
2Ease of manufacture
If the method using Grignard reagent is used, then the diphenylmethane derivative can be synthesized, but separate preparation process is required and cost increases
Solution Approach 1:
The patent merges the synthesis of diphenylmethane derivative with the formation of Grignard reagent into a single one-pot reaction process, eliminating the need for separate preparation steps and reducing overall process complexity while maintaining synthetic efficiency
Solution Approach 2:
The patent performs preliminary formation of the boron-based reagent in-situ before the main coupling reaction, avoiding the need for separate Grignard reagent preparation and simplifying the overall process flow
3Ease of manufacture
If the method using Grignard reagent is used, then the diphenylmethane derivative can be synthesized, but related substances are generated and reprocessing is required
Solution Approach 1:
The patent converts the potentially harmful side reactions that generate related substances into beneficial selective reactions by using the boron-based method, which proceeds through a different mechanism that inherently produces fewer by-products and improves product purity without requiring additional reprocessing
4Ease of manufacture
If the linear synthesis method is used, then the diphenylmethane derivative can be synthesized, but the synthesis route is lengthy and yield is reduced
Solution Approach 1:
The patent combines multiple linear synthesis steps into a single convergent one-pot reaction, dramatically reducing the number of operations required and improving overall synthesis efficiency and yield while maintaining the same synthetic transformation
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 reduces synthesis processes, minimizes the generation of unwanted substances, and eliminates the need for reprocessing, thereby improving yield and simplifying the production of diphenylmethane derivatives for use as SGLT inhibitors.
Implementation Method 1
reacting the compound of Formula 3 with oxalyl halide to obtain a compound of Formula 4
Implementation Method 2
deoxygenating the compound of Formula 6 to obtain a compound of Formula 7
Data Source
AI summary
Disclosed is a method of preparing an intermediate useful for synthesis of a diphenylmethane derivative that can be used as an SGLT inhibitor. A method of synthesizing a compound of Formula 7 according to the present invention can address problems of existing synthesis processes of requiring additional processes, due to synthesis of the Grignard reagent, and management of related substances. In addition, the method according to the present invention can minimize the generation of related substances, and thus does not require reprocessing of reaction products, thereby being capable of simplifying a process. Accordingly, the production yield of a diphenylmethane derivative can be maximized.