Direct β-C(sp3)-H Functionalization to Carbonyls: A Route to Aldehydic Acid Derivatives
Koneti Kondalarao1, Matteda Priyanka1, Akhila K Sahoo1
1School of Chemistry, University of Hyderabad, Gachibowli, Telangana, India 500046.
Organic Letters
|February 23, 2026
Summary
This study introduces a new palladium-catalyzed method for forming carbonyl (C═O) bonds by functionalizing inert C-H bonds. The strategy uses a sulfoximine directing group for selective oxidation to aldehydes, advancing complex molecule synthesis.
Area of Science:
- Organic Chemistry
- Catalysis
- Synthetic Methodology
Background:
- Direct functionalization of C-H bonds remains a significant challenge in organic synthesis.
- Developing selective methods for C═O bond formation is crucial for synthesizing aldehydes and complex molecules.
Purpose of the Study:
- To develop a general strategy for C═O bond formation via palladium-catalyzed β-C(sp3)-H functionalization.
- To utilize sulfoximine as a neutral directing group for chemoselective oxidation of inert C-H bonds.
Main Methods:
- Employing palladium catalysis with a sulfoximine directing group.
- Utilizing 2-nitro-iodylbenzene as the sole oxidant and oxygen source.
- Investigating the cooperative effects of the directing group and ligand for selectivity.
Main Results:
- Achieved chemoselective oxidation of inert β-C(sp3)-H bonds to aldehydes.
- Demonstrated broad functional group tolerance in the developed strategy.
- Showcased the potential for advancing complex molecule development.
Conclusions:
- The described strategy offers a novel approach for C═O bond formation.
- The method provides high selectivity and functional group tolerance.
- This work contributes to the advancement of synthetic organic chemistry and complex molecule synthesis.
Related Concept Videos
01:22Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
5.1K
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 activated by...
The carbonyl center is activated by...
5.1K
01:10C–C Bond Formation: Aldol Condensation Overview
16.5K
Aldol condensation is an important route in synthetic organic chemistry used to generate a new carbon–carbon bond under basic or acidic conditions. The aldol condensation reaction presented in Figure 1 constitutes an aldol addition reaction followed by the dehydration process.
16.5K
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
21.6K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
21.6K
01:17Carboxylic Acids to Primary Alcohols: Hydride Reduction
5.3K
Carboxylic acids, upon reaction with strong reducing agents such as lithium aluminum hydride followed by hydrolysis, undergo reduction to form primary alcohols.
5.3K
01:18Preparation of Aldehydes and Ketones from Carboxylic Acid Derivatives
3.6K
Aldehydes are more reactive than carboxylic acids and hence, can get over-reduced to alcohol in the presence of strong reducing agents. Therefore, carboxylic acids are inefficient in preparing aldehydes using LAH.
Carboxylic acid derivatives like acid chlorides and esters are more easily reducible than the corresponding acids. The derivatives reduce in the presence of mild reducing agents to give aldehydes. Aldehydes can also be prepared by Rosenmund reduction, that is, the reduction of...
Carboxylic acid derivatives like acid chlorides and esters are more easily reducible than the corresponding acids. The derivatives reduce in the presence of mild reducing agents to give aldehydes. Aldehydes can also be prepared by Rosenmund reduction, that is, the reduction of...
3.6K
01:23Protecting Groups for Aldehydes and Ketones: Introduction
9.2K
Protecting groups are compounds that can bind to a specific functional group in the presence of other functional groups to protect them from undesired chemical reactions. These compounds can selectively bind to particular functional groups and advance chemoselective reactions in polyfunctional systems (Figure 1). After the functional group has served its purpose, it is removed by reacting it with specific compounds.
9.2K