Related Experiment Video
Updated: Sep 18, 2025
07:06
A Microwave-Assisted Direct Heteroarylation of Ketones Using Transition Metal Catalysis
Published on: February 16, 2020
8.3K
Migrative Reductive Amination of Ketones Enabled by Multitasking Reagents
1Department of Chemistry, 4-010 Centennial Centre for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
The Journal of Organic Chemistry
|June 20, 2025
Summary
A novel migrative reductive amination method expands synthetic chemistry by rearranging carbon skeletons. This green chemistry approach uses inexpensive reagents for efficient synthesis of complex amines, including natural products.
Area of Science:
- Organic Chemistry
- Synthetic Methodology
- Green Chemistry
Background:
- Secondary amines are crucial in pharmaceuticals and organic synthesis.
- Classical reductive amination offers limited structural diversity.
- Expanding synthetic routes to complex amines is essential.
Purpose of the Study:
- To develop a novel migrative reductive amination for accessing isomeric amines.
- To create a versatile and green synthetic method using inexpensive reagents.
- To demonstrate the application of this method in natural product synthesis.
Main Methods:
- Orchestration of three reactions in a single flask without solvent changes.
- Utilizing a Zn(II) salt and a hydrosilane as key reagents.
- Investigating mechanistic insights into reagent synergy and multitasking.
Main Results:
- Successful synthesis of diverse secondary amines from various ketones and aldehydes.
- Demonstrated wide scope including aliphatic, aromatic, bioactive, and macrocyclic compounds.
- Achieved a one-step synthesis of the marine natural product haliclorensin C.
Conclusions:
- The developed migrative reductive amination is a powerful and green synthetic tool.
- The method offers access to complex amine structures with rearranged skeletons.
- This approach aligns with green chemistry principles and shows high efficiency.
More Related Videos
Related Concept Videos
01:38Preparation of Amines: Reductive Amination of Aldehydes and Ketones
3.2K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
3.2K
01:22Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
4.4K
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is...
The carbonyl center is...
4.4K
01:19α-Hydroxy Ketones via Reductive Coupling of Esters: Acyloin Condensation Overview
2.9K
The pinacol and McMurry reactions involve the reductive coupling of ketones or aldehydes. Similarly, the bimolecular reductive coupling of two ester molecules in the presence of sodium metal in an aprotic solvent yields an α-hydroxy ketone product. The α-hydroxy ketone is also called acyloin, so the reaction is referred to as ‘acyloin condensation.’
2.9K
01:22Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction
2.0K
The radical dimerization of ketones or aldehydes gives vicinal diols through a pinacol coupling reaction. However, the behavior of titanium metals used for the reaction as a source of electrons is unusual. When the reaction is carried out in the presence of titanium, diols can be isolated at low temperatures. Else titanium further reacts with diols, forming alkenes through the McMurry reaction.
2.0K
01:10α-Alkylation of Ketones via Enolate Ions
3.3K
Ketones with α protons are deprotonated by strong bases like lithium diisopropylamide (LDA) to form enolate ions. The anion is stabilized by resonance, and its hybrid structure exhibits negative charges on the carbonyl oxygen and the α carbon. This ambident nucleophile can attack an electrophile via two possible sites: the carbonyl oxygen, known as O-attack, or the α carbon, known as C-attack. The nucleophilic attack via the carbanionic site is preferred. This is due to the...
3.3K
02:23Alcohols from Carbonyl Compounds: Reduction
10.8K
Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
10.8K