Palladium-Promoted Transformation of β-Amino Ketones to Enaminones
作者:Shun-Ichi Murahashi、Yo Mitsue、Tatsuo Tsumiyama
DOI:10.1246/bcsj.60.3285
日期:1987.9
The reaction of β-amino ketones with bis(acetonitrile)dichloropalladium(II) in the presence of triethylamine gives the corresponding enaminones regioselectively. The cyclic β-amino ketones can be converted into the corresponding exocyclic enaminones. The enaminones thus obtained are versatile synthetic intermediates. The reaction of (E)-enaminones with organocuprates gave the corresponding (E)-α,β-unsaturated ketones.
Iron-Catalyzed Trimerization of Terminal Alkynes Enabled by Pyrimidinediimine Ligands: A Regioselective Method for the Synthesis of 1,3,5-Substituted Arenes
作者:Julianna S. Doll、Robert Eichelmann、Leif E. Hertwig、Thilo Bender、Vincenz J. Kohler、Eckhard Bill、Hubert Wadepohl、Dragoş-Adrian Roşca
DOI:10.1021/acscatal.1c00978
日期:2021.5.7
to a functional-group-tolerant methodology for the catalytic trimerization of terminal aliphatic alkynes. Remarkably, in contrast to established alkyne trimerization protocols, the 1,3,5-substituted arenes are the main reaction products. Preliminary mechanistic investigations suggest that the enhanced π-acidity of the pyrimidine ring, combined with the hemilability of the imine groups coordinated to
Enantioselective construction of 2,5-dihydropyrrole skeleton with quaternary stereogenic center via catalytic asymmetric 1,3-dipolar cycloaddition involving α-arylglycine esters
作者:Feng Shi、Gui-Juan Xing、Wei Tan、Ren-Yi Zhu、Shujiang Tu
DOI:10.1039/c2ob26566d
日期:——
A catalyticasymmetricconstruction of synthetically and biologically important 2,5-dihydropyrrole scaffolds with concomitant creation of multiple chiral carbon centers including one quaternary stereogenic center in high yields (up to 99%) and excellent enantioselectivities (up to 99% ee) has been established via an organocatalytic 1,3-dipolarcycloaddition using α-arylglycine esters as azomethine precursors