Superbase-Promoted Addition of Acetylene Gas to the C=N Bond
作者:Elena Yu. Schmidt、Ivan A. Bidusenko、Nadezhda I. Protsuk、Yan V. Demyanov、Igor A. Ushakov、Boris A. Trofimov
DOI:10.1002/ejoc.201900932
日期:2019.9.15
Acetylene gas readily adds to the C=N bond of ketimines in KOtBu/DMSO solution at room temperature to afford terminal propargylamines with a quaternary carbon center in up to 94 % yield. The reaction represents a new Csp3–Csp bond formation under mild transition metal free conditions using available widespread starting materials covering a broad scope of ketimines.
Pd/Cu‐Catalyzed Cross‐Coupling of Densely Substituted Propargylamines with Aromatic Acyl Chlorides Followed by the Treatment with a Base: Access to Dihydro‐3
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‐Pyrrol‐3‐Ones
作者:Pavel A. Volkov、Kseniya O. Khrapova、Anton A. Telezhkin、Ivan A. Bidusenko、Elena Yu. Schmidt、Alexander I. Albanov、Boris A. Trofimov
DOI:10.1002/adsc.202201179
日期:2023.1.10
Pd/Cu-catalyzed cross-coupling of propargylamines with aromatic acylchlorides (PdCl2, CuI, Ph3P, 40–45 °C) provides α-aryl(hetaryl)aminoacetylenic ketones in a yield of up to 97%. The latter undergo cyclization to 1,2,5-triaryl(hetaryl)-1,2-dihydro-3H-pyrrol-3-ones in up to 93% yield after the treatment with KOH or Et2NH (40–55 °C, aqueous ethanol). The one-pot synthesis of the pyrrol-3-ones (in up
Dihydropyrrole-3-thiones: one-pot synthesis from propargylamines, acyl chlorides and sodium sulfide
作者:Pavel A. Volkov、Kseniya O. Khrapova、Ekaterina M. Vyi、Anton A. Telezhkin、Ivan A. Bidusenko、Alexander I. Albanov、Elena Yu. Schmidt、Boris A. Trofimov
DOI:10.1039/d3ob01061a
日期:——
An efficient one-potsynthesis of 1,2,5-trisubstituted-1,2-dihydro-3H-pyrrole-3-thiones (up to 91% yield), representatives of essentially new heterocyclic systems, by the successive treatment of available propargylamines with acyl chlorides (PdCl2/CuI/Ph3P/Et3N, toluene, 40–45 °C, 3 h) and sodium sulfide (Na2S·9H2O, EtOH, 20–25 °C, 7 h) has been developed. The synthesis comprises the addition of sulfide