Related Experiment Video
Updated: May 29, 2025

Preparation of N-2-alkoxyvinylsulfonamides from N-tosyl-1,2,3-triazoles and Subsequent Conversion to Substituted Phthalans and Phenethylamines
Published on: January 3, 2018
Asymmetric multi-component trifunctionalization reactions with α-Halo Rh-carbenes.
Xiaoyan Yang1, Xiaoyu Zhou2, Wenhao Hu3
1State Key Laboratory of Anti-Infective Drug Discovery and Development, Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China.
This study introduces a new catalytic method using alpha-halo Rh-carbenes for multi-functionalization reactions. It enables the efficient synthesis of chiral compounds with high yield and enantioselectivity.
Area of Science:
- Organic Chemistry
- Catalysis
- Synthetic Methodology
Background:
- Multi-component reactions are vital for synthesizing diverse compounds.
- Metal carbynoids offer unique reactivity for synthetic advancements.
- Limited precursors for metal carbynoids restrict their catalytic applications.
Purpose of the Study:
- To explore the catalytic potential of alpha-halo Rh-carbenes in multi-functionalization.
- To develop a novel asymmetric trifunctionalization reaction.
- To synthesize chiral alpha-cyclic ketal beta-amino esters.
Main Methods:
- Utilizing alpha-halo Rh-carbenes as metal carbynoid precursors.
- Employing chiral phosphoric acid catalysis.
- Conducting asymmetric trifunctionalization reactions.
Main Results:
- Developed a method for synthesizing chiral alpha-cyclic ketal beta-amino esters.
- Achieved high yields and excellent enantioselectivity.
- Demonstrated carbynoid properties of alpha-halo Rh-carbenes.
Conclusions:
- Alpha-halo Rh-carbenes can act as effective metal carbynoid precursors.
- The developed method provides access to valuable chiral molecules.
- This work expands the scope of catalytic multi-functionalization reactions.
More Related Videos
07:50Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
Published on: May 26, 2019
19:58Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Related Concept Videos
Multiple Halogenation of Methyl Ketones: Haloform Reaction
Reactions of α-Halocarbonyl Compounds: Nucleophilic Substitution
α-Halogenation of Carboxylic Acid Derivatives: Overview
α-Bromination of Carboxylic Acids: Hell–Volhard–Zelinski Reaction
Acid-Catalyzed α-Halogenation of Aldehydes and Ketones
In the first step of the mechanism, the acid protonates the carbonyl oxygen resulting in a resonance-stabilized cation, which subsequently loses an α-hydrogen to form an enol tautomer. The C=C bond in an enol is highly nucleophilic because of the electron-donating nature of the –OH group. Consequently, the double bond attacks an electrophilic halogen to form a...
Base-Promoted α-Halogenation of Aldehydes and Ketones