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Beilstein J. Org. Chem. 2021, 17, 2906–2914, doi:10.3762/bjoc.17.198
Graphical Abstract
Scheme 1: General procedure for α-bromination of δ-valerolactone (1a) and the method described in this work.
Scheme 2: Tetraalkylammonium salt-mediated intramolecular cyclization of 2a.
Scheme 3: Synthesis of α-functionalized lactones using the two-phase system.
Scheme 4: Synthesis of unsymmetrically functionalized sulfide 5 via the two-phase system-promoted intramolecu...
Scheme 5: Sequential nucleophilic substitution in the two-phase system.
Scheme 6: One-pot synthesis of 2-phenylthio-α-valerolactone 6.