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1,3‐Disubstituted bicyclo[1.1.1]pentanes (BCPs) are valuable bioisosteres of para ‐substituted aromatic rings. The most direct route to these structures is via multi‐component ring‐opening reactions of [1.1.1]propellane. However, challenges associated with these transformations mean that difunctionalized BCPs are more commonly prepared via multistep reaction sequences with BCP‐halide intermediates. Herein, we report three‐ and four‐component 1,3‐difunctionalizations of [1.1.1]propellane with organometallic reagents, organoboronic esters and a variety of electrophiles. This is achieved by trapping intermediate BCP‐metal species with boronic esters to form boronate complexes, which are versatile intermediates whose electrophile‐induced 1,2‐metallate rearrangement chemistry enables a broad range of C–C bond‐forming reactions.
|Number of pages||6|
|Journal||Angewandte Chemie - International Edition|
|Early online date||8 Jan 2020|
|Publication status||Published - 2 Mar 2020|
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Modular approach to structurally diverse four-membered (spiro)cycles using highly strained precursors
1/04/19 → 30/09/23
31/07/18 → 30/07/20