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Ruskin J, Sachs RK, Wang M, Dekeyser R, Lew Z, Williams P, Hwang H, Majumdar A, Dudding T, Lectka T. Metal Ion-Induced Large Fragment Deactivation: A Different Strategy for Site-Selectivity in a Complex Molecule. Angew Chem Int Ed Engl 2024; 63:e202317070. [PMID: 38063469 DOI: 10.1002/anie.202317070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Indexed: 12/23/2023]
Abstract
Complex natural product functionalizations generally involve the use of highly engineered reagents, catalysts, or enzymes to react exclusively at a desired site through lowering of a select transition state energy. In this communication, we report a new, complementary strategy in which all transition states representing undesirable sites in a complex ionophore substrate are simultaneously energetically increased through the chelation of a metal ion to the large fragment we wish to neutralize. In the case of an electrophilic, radical based fluorination reaction, charge repulsion (electric field effects), induced steric effects, and electron withdrawal provide the necessary deactivation and proof of principle to afford a highly desirable natural product derivative. We envisage that many other electrophilic or charge based synthetic methods may be amenable to this approach as well.
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Affiliation(s)
- Jonah Ruskin
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Roseann K Sachs
- Department of Chemistry and Biochemistry, Messiah University, One University Avenue, Mechanicsburg, PA 17055, USA
| | - Muyuan Wang
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Roxanne Dekeyser
- Department of Chemistry, Brock University, St. Catharines, Ontario, L2S3A1, Canada
| | - Zachary Lew
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Phoebe Williams
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Habin Hwang
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Ananya Majumdar
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Travis Dudding
- Department of Chemistry, Brock University, St. Catharines, Ontario, L2S3A1, Canada
| | - Thomas Lectka
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
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