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Mu X, Axtell JC, Bernier NA, Kirlikovali KO, Jung D, Umanzor A, Qian K, Chen X, Bay KL, Kirollos M, Rheingold AL, Houk KN, Spokoyny AM. Sterically Unprotected Nucleophilic Boron Cluster Reagents. Chem 2019; 5:2461-2469. [PMID: 32292833 DOI: 10.1016/j.chempr.2019.07.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A cornerstone of modern synthetic chemistry rests on the ability to manipulate the reactivity of a carbon center by rendering it either electrophilic or nucleophilic. However, accessing a similar reactivity spectrum with boron-based reagents has been significantly more challenging. While classical nucleophilic carbon-based reagents normally do not require steric protection, readily accessible, unprotected boron-based nucleophiles have not yet been realized. Herein, we demonstrate that the bench stable closo-hexaborate cluster anion can engage in a nucleophilic substitution reaction with a wide array of organic and main group electrophiles. The resulting molecules containing B‒C bonds can be further converted to tricoordinate boron species widely used in organic synthesis.
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Affiliation(s)
- Xin Mu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Jonathan C Axtell
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Nicholas A Bernier
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Kent O Kirlikovali
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Dahee Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Alexander Umanzor
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Kevin Qian
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Katherine L Bay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Monica Kirollos
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 609 Charles E. Young Drive East, Los Angeles, CA 90095, USA.,Department California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.,Lead Contact
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