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Antimony(III) chloride catalyzed direct three component one-pot Mannich reaction
Prashant Shukla1, Nilmadhab Chattopadhyay, Sandip K Nayak
1Bio-Organic Division, Bhabha Atomic Research Centre, Mumbai-400085, India.
Antimony(III) chloride efficiently catalyzes a three-component Mannich reaction. This process yields beta-amino ketones from Schiff bases and ketones at room temperature with good results.
Area of Science:
- Organic Chemistry
- Catalysis
- Synthetic Methodology
Background:
- The Mannich reaction is a fundamental carbon-carbon bond-forming reaction in organic synthesis.
- Developing efficient catalytic systems for Mannich reactions is crucial for accessing valuable chemical scaffolds.
Purpose of the Study:
- To investigate the catalytic activity of Antimony(III) chloride in a three-component Mannich type reaction.
- To explore the reaction of in-situ generated Schiff bases with cyclic and acyclic ketones.
Main Methods:
- Utilizing Antimony(III) chloride as a catalyst.
- Generating Schiff bases in situ from aromatic aldehydes and anilines.
- Reacting Schiff bases with cyclic/acyclic ketones in a one-pot procedure.
Main Results:
- The reaction proceeded smoothly at ambient temperature.
- Good yields of beta-amino ketones were obtained.
- Moderate to good diastereoselectivity was observed.
Conclusions:
- Antimony(III) chloride is an effective catalyst for the three-component Mannich reaction.
- This method provides a facile route to beta-amino ketones.
- The reaction conditions are mild and efficient.
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