Bulk Gold-Catalyzed Reactions of Diazoalkanes with Amines and O2 to Give Enamines
作者:Yibo Zhou、Robert J. Angelici、L. Keith Woo
DOI:10.1007/s10562-010-0339-7
日期:2010.6
particles, catalyzes reactions of diazoalkanes E(H)C=N2, where E is CO2Et or PhC(O), with amines R1R2NH and O2 to give enamine products (R1R2N)(E)C=CH(E) in 58–94% yield. The reactions are proposed to occur by initial formation of surface-bound (E)(H)C: carbene groups that are attacked by nucleophilic amines. The enamine products are very different than those obtained in reactions catalyzed by homogeneous
A visible-light induced photo-click and release approach between monoarylsydnone and phenoxylfumarate was established to realize a precise dual fluorescence turn-on under light control.
The practical synthesis of polysubstituted tetrahydropyrimidines 4 from but-2-ynedioates 1, amines 2, and formaldehyde 3 through a domino process of one-pot multicomponent reactions (MCRs) and the detailed mechanistic studies are described. The MCRs were performed under extremely mild reaction conditions and offered the desired products in excellent yields. The detailed studies on the mechanism of
Reaction of β-enaminones and acetylene dicarboxylates: synthesis of substituted 1,2-dihydropyridinones
作者:Vemu Nagaraju、Dalovai Purnachander、N. S. V. M. Rao Mangina、Surisetti Suresh、Balasubramanian Sridhar、Galla V. Karunakar
DOI:10.1039/c4ob01578a
日期:——
Synthesis of substituted 1,2-dihydropyridinones is described in a one pot reaction of β-enaminones and acetylene dicarboxylates where new C–C and C–N bonds were formed. The title compounds were obtained in moderate to good yields.
Catalyst‐Free Transfer Hydrogenation from Amine‐Borane Small Oligomers
作者:Louis Le Moigne、Tommaso Posenato、David Gajan、Jennifer Lesage de la Haye、Jean Raynaud、Emmanuel Lacôte
DOI:10.1002/chem.202300145
日期:2024.1.2
were prepared via capping agent-controlled AA/BB polycondensation. Solid-state NMR spectroscopy, Differential Scanning Calorimetry and reactivity in catalyst-free transfer hydrogenations – to aldehydes, imines, electron-pooralkenes and alkynes – were used to assess how the oligomers bridge the gap between molecular amine-boranes and poly(amine-borane)s.