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Introduction
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Enantioselective α-Boryl Carbene Transformations.

Ming-Yao Huang¹, Jia-Bao Zhao¹, Cheng-Da Zhang¹

¹Frontiers Science Center for New Organic Matter, The State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Journal of the American Chemical Society

|March 28, 2024

Summary

Researchers developed a new method to synthesize chiral organoborons using α-boryl carbenes derived from boryl cyclopropenes. This breakthrough enables diverse enantioselective transformations, expanding carbene and organoboron chemistry.

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A Microwave-Assisted Direct Heteroarylation of Ketones Using Transition Metal Catalysis

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Published on: February 16, 2020

Area of Science:

Organic Chemistry
Organometallic Chemistry

Background:

Carbenes are reactive intermediates crucial for chemical synthesis.
Organoborons are versatile compounds with broad applications.
α-boryl carbenes are valuable but difficult to access, limiting their use in asymmetric synthesis.

Purpose of the Study:

To develop a novel and efficient method for synthesizing chiral organoborons.
To explore the asymmetric transformations of α-boryl carbenes.
To expand the scope of carbene and organoboron chemistry.

Main Methods:

Utilized boryl cyclopropenes as precursors for α-boryl metal carbenes.
Employed a single chiral copper complex as a catalyst.
Investigated enantioselective B-H and Si-H insertion, cyclopropanation, and cyclopropanation/Cope rearrangement reactions.

Main Results:

Achieved swift synthesis of α-boryl metal carbenes.
Demonstrated highly enantioselective transfer reactions catalyzed by the chiral copper complex.
Generated previously inaccessible chiral organoboron compounds.

Conclusions:

The developed method provides access to valuable chiral organoborons.
This approach significantly advances asymmetric carbene and organoboron chemistry.
The methodology offers a platform for creating diverse and easily transformable chiral organoboron structures.