Intramolecular Hydroamidation of <i>ortho</i>
-Vinyl Benzamides Promoted by Potassium <i>tert</i>
-Butoxide/<i>N,N</i>
-Dimethylformamide
作者:Zhen-yu Chen、Liang-yu Wu、Hai-sheng Fang、Ting Zhang、Zhi-feng Mao、Yong Zou、Xue-jing Zhang、Ming Yan
DOI:10.1002/adsc.201700369
日期:2017.11.23
An intramolecular hydroamidation of ortho-vinyl benzamides had been developed. The reaction was promoted efficiently by potassiumtert-butoxide and N,N-dimethylformamide without the need for strong oxidants or transition-metal catalysts. A series of dihydroisoquinolinones and 3-benzylisoindolinones were prepared in good to excellent yields. The new method is operationally simple, scalable, and tolerant
A New Entry for the Preparation of Substituted Aromatic Carbonyl Compounds Mediated by Samarium(II) Iodide
作者:Hidemi Yoda、Naoki Kohata、Kunihiko Takabe
DOI:10.1081/scc-120017130
日期:2003.1.5
Abstract A new route to substituted aromatic lactones and lactams via SmI2-promoted desulfurization is described. Direct replacement of the phenylthio substituent by hydroxyalkylated groups featuring the novel accessible process for the construction of continuous quaternary carbon centers could be accomplished when the same type of reactions was undertaken with carbonyl compounds in the presence of
Novel Chemoselective Desulfurization of γ-Phenylthio-Substituted Aromatic Lactams: Application to the Synthesis of Isoindolobenzazepine Alkaloid, Lennoxamine
作者:Hidemi Yoda、Takamasa Suzuki、Kunihiko Takabe
DOI:10.1055/s-2006-956452
日期:2006.12
Treatment of a variety of γ-phenylthio-substituted aromatic lactams with lithium aluminum hydride in the presence of cuprous iodide led to novel chemoselective desulfurization reactions to afford the corresponding substituted aromatic lactams without giving the carbonyl-reduced and/or ring-opened products in extremely high yields. This process was further applied to the total synthesis of an isoindolobenzazepine alkaloid, lennoxamine, by featuring the elaboration of the functionalized phthalimide derivative.
Metal‐ and Oxidant‐Free Electrosynthesis of Heterocycles from 1,2‐Diarylalkene Derivatives
作者:Eunsoo Yu、Hyungguk Kim、Cheol‐Min Park
DOI:10.1002/adsc.202200847
日期:2022.12.8
Synthesis of heterocycles from 1,2-diarylalkene derivatives through electrosynthesis under metal- and oxidant-free conditions has been discovered. Cathodic reduction of 2-alkenylbenzoic acid or anodic oxidation of 2-alkenylbenzamide, 2-alkenylphenol and 2-alkenylaniline leads to the formation of reactive radical intermediates which afford corresponding phthalide, isochroman-1-one, isoindolin-1-one