Unsaturated Aldehyde Synthesis via Acid-Catalyzed Rearrangement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methodologies for accessing unsaturated aldehydes suffer from low selectivity and yield, and often require multiple steps.
Innovation Solution
A process involving the treatment of tetrahydrofuran-2-ol or tetrahydro-2H-pyran-2-ol derivatives, obtained via hydroformylation, with an acid in the presence of a polyol or an alpha hydroxy carboxylic acid to achieve high yield and selectivity in preparing compound of formula (I).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methodologies are used to access unsaturated aldehydes, then the synthesis can be performed, but the selectivity and yield are low and multiple steps are required
Solution Approach 1:
The patent changes the chemical parameters by introducing a polyol or alpha-hydroxy carboxylic acid as a catalyst in the rearrangement reaction. This parameter change transforms the reaction pathway to achieve high selectivity for unsaturated aldehydes while maintaining high yield, resolving the contradiction between productivity and manufacturing precision
Solution Approach 2:
The patent uses a polyol or alpha-hydroxy carboxylic acid as an intermediary substance that mediates the rearrangement reaction of the hydroformylation product. This intermediary enables the transformation to proceed with high selectivity and yield in a single step, eliminating the need for multiple steps while improving both productivity and manufacturing precision
2Productivity
If existing methodologies are used to access unsaturated aldehydes, then the synthesis can be performed, but multiple steps are required
Solution Approach 1:
The patent merges the hydroformylation reaction and the rearrangement reaction into a single integrated process. By performing the rearrangement in situ using a polyol or alpha-hydroxy carboxylic acid catalyst, the process reduces multiple steps into one, improving productivity while maintaining ease of manufacture through a streamlined procedure
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 process provides a high-yield and high-selectivity route to compound of formula (I), which can be easily converted into the corresponding aldehyde, offering an efficient and streamlined synthesis.
Implementation Method 1
treating a tetrahydrofuran-2-ol or tetrahydro-2H-pyran-2-ol derivative, obtained via hydroformylation, with an acid in the presence of a polyol or an alpha hydroxy carboxylic acid
Implementation Method 2
there is no report of such a rearrangement as disclosed in the present invention
Implementation Method 3
by the hydroformylation of a compound of formula (VI) in a presence of a hydroformylation catalyst comprising a bidentate phosphorous ligand and optionally an alcohol or a polyol
Data Source
AI summary
Disclosed herein is a process for preparing a compound of formula (I) starting from a compound of formula (II). Also disclosed herein are a process to prepare a compound of formula (II) and the compound of formula (II).