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![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)
Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
Palladium-catalyzed highly diastereoselective oxidative cascade cyclization reactions
Kai-Tai Yip1, Nian-Yong Zhu, Dan Yang
1Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China.
Novel palladium catalysts using isoquinoline or quinoline ligands enable efficient oxidative cascade cyclization. This reaction forms versatile indoline derivatives from unsaturated anilides in a single step with high stereoselectivity.
Area of Science:
- Organic Chemistry
- Catalysis
- Synthetic Methodology
Background:
- Palladium-catalyzed reactions are crucial in organic synthesis.
- Developing efficient methods for constructing complex molecules like indolines is essential.
Purpose of the Study:
- To discover novel ligands for palladium-catalyzed oxidative cascade cyclization.
- To develop a new synthetic route to structurally versatile indoline derivatives.
Main Methods:
- Utilized palladium(II) acetate (Pd(OAc)2) with isoquinoline or quinoline as ligands.
- Employed unsaturated anilides as substrates.
- Conducted reactions under an oxygen atmosphere (1 atm).
Main Results:
- Achieved efficient cyclization of unsaturated anilides to form indoline derivatives.
- Demonstrated the formation of one C-N bond and two C-C bonds in a single synthetic step.
- Obtained good yields and excellent diastereoselectivities (dr > 24:1).
Conclusions:
- Isoquinoline and quinoline are effective novel ligands for this transformation.
- The developed catalytic system offers a streamlined approach to synthesizing complex indolines.
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