Nitrosation Reagents for Mild, Functional-Group-Tolerant Reactions
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Solution Overview
Problem
Existing nitrosation reagents like tert-butyl nitrate (TBN) are highly toxic, reactive, and require cryogenic storage, while inorganic reagents like sodium nitrite and hydrochloric acid necessitate high temperatures and acidic conditions, limiting their effectiveness and substrate scope due to reactivity with functional groups.
Innovation Solution
Development of novel nitrosation reagents and methods that include reacting substrates with compounds enriched in the 15N isotope, offering safer and more versatile nitrosation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tert-butyl nitrate (TBN) is used as a nitrosation reagent, then nitrosation can be performed, but the reagent is highly toxic, reactive, and requires cryogenic storage
Solution Approach 1:
The patent changes the chemical parameters of the nitrosation reagent by using N-nitroso compounds with specific structural features (electron-withdrawing groups on nitrogen) to achieve milder reactivity and eliminate cryogenic storage requirements while maintaining nitrosation capability
Solution Approach 2:
The patent employs readily available, stable N-nitroso compounds that can be stored under normal conditions rather than requiring specialized cryogenic storage infrastructure, making the reagents more practical for general laboratory use
2Productivity
If inorganic reagents like sodium nitrite and hydrochloric acid are used, then nitrosation can be performed, but very high temperatures and acidic conditions are required
Solution Approach 1:
The patent changes the reaction conditions by using N-nitroso compounds that perform nitrosation at mild temperatures without requiring high heat input or acidic conditions, thereby expanding substrate scope to include temperature-sensitive functional groups
3Productivity
If existing nitrosation reagents are used, then nitrosation can be performed, but the reagents react with many functional groups requiring protecting groups
Solution Approach 1:
The patent introduces electron-withdrawing groups at specific positions on the nitrogen atom of the N-nitroso compound to create localized reactivity that is selective for certain substrates while being tolerant of other functional groups, thereby reducing the need for protecting groups
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
Provides safer and more effective nitrosation reactions that can be performed under milder conditions, expanding the scope of substrates that can be used without the need for protecting groups.
Implementation Method 1
Nitrosation and nitrosylation are chemical reactions that involve attaching an—NO group to another molecule
Data Source
AI summary
Provided are compounds that can find use as nitrosation reagents. Provided are nitrosation methods that include reacting a substrate with one of the provided nitrosation reagents and thereby generating a nitrosation product. Provided are kits including a nitrosation reagent. Provided are compositions wherein the nitrosation reagent is enriched in the 15N isotope.