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Updated: Jan 4, 2026

Preparation of Contiguous Bisaziridines for Regioselective Ring-Opening Reactions
Published on: July 28, 2022
Diborylalkyllithium Salts Trigger Regioselective Ring Opening of Vinyl Aziridines
Oriol Salvado1, Riccardo Gava1, Elena Fernández1
1Dept. Química Física i Inorgànica , Universitat Rovira i Virgili , Tarragona , Spain.
Abstract:
gem-Diborylalkanes treated with LiTMP produce α-diborylalkane lithium bases that perform nucleophilic attack on vinyl aziridines with controlled regioselectivity. Preferred SN2 diborylalkylation ring opening reaction on the less sterically hindered position is observed with 1-tosyl-2-vinylaziridine, whereas exclusive SN2' nucleophilic attack occurs on 2-methyl-1-tosyl-2-vinylaziridine. Cyclic vinyl aziridines interact through a third venue, via SN2 diborylalkylation ring opening reaction on the allylic position. Homoallylic diboronates are formed with complete stereochemical control.
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