Ifosfamide Intermediate Synthesis Avoiding Toxic Aziridine
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Solution Overview
Problem
Existing synthetic routes for ifosfamide involve highly toxic and explosive chemicals, posing safety hazards in production, particularly due to the use of aziridine and sodium borohydride.
Innovation Solution
A safer synthetic route for ifosfamide is developed by reacting a compound of formula II with 3-bromo-propane-1-ol in the presence of an acid binding agent, such as triethylamine, followed by chlorination with thionyl or oxalyl chloride in the presence of an organic base, to obtain ifosfamide without using hazardous materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aziridine is used as starting material in existing synthetic routes, then ifosfamide can be obtained, but highly toxic and explosive chemicals are involved posing safety hazards
Solution Approach 1:
The patent introduces a novel intermediate compound (formula I) as a mediator in the synthetic route. This intermediate reacts with chloroethylamine hydrochloride to form ifosfamide, replacing the need to use hazardous aziridine and sodium borohydride directly in the synthesis process, thus eliminating the harmful factors while maintaining the synthesis pathway
Solution Approach 2:
The patent extracts and removes the hazardous components (aziridine and sodium borohydride) from the synthetic route. By taking out these toxic and explosive chemicals from the process, the invention eliminates the safety hazards while still achieving the formation of ifosfamide through an alternative pathway using the novel intermediate
2Productivity
If sodium borohydride is used for reduction of amides to amines, then ifosfamide can be obtained, but explosive chemicals are involved requiring strict control
Solution Approach 1:
The novel intermediate compound (formula I) serves as a mediator that eliminates the need for sodium borohydride in the reduction step. The intermediate is designed to react directly with chloroethylamine hydrochloride to form ifosfamide, removing the explosive sodium borohydride from the process while maintaining synthesis efficiency
Solution Approach 2:
The patent takes out sodium borohydride from the synthetic route by designing a new pathway where the intermediate compound directly undergoes reaction with chloroethylamine hydrochloride. This extraction of the explosive chemical eliminates safety control requirements while preserving the productivity of the synthesis
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 avoids the use of highly toxic and explosive chemicals, ensuring safer production and achieving high yields of ifosfamide while maintaining structural integrity.
Implementation Method 1
reacting a compound of formula II with 3-bromo-propane-1-ol in the presence of an acid binding agent
Implementation Method 2
reacting with a chlorinating agent, and then obtaining ifosfamide in the present of a base
Data Source
AI summary
The invention discloses an ifosfamide intermediate, a preparation method and application thereof. The ifosfamide intermediate has formula I. The ifosfamide intermediate reacts with a chlorinating agent, and then cyclization is performed under the action of an organic base to obtain ifosfamide. Compared with the existing synthetic routes, the method of the invention has the advantages that the use of highly toxic and explosive ethyleneimine can be avoided, and the use of explosive chemicals can be avoided.