A novel two-step preparation of enaminoketones by amination of α,β-unsaturated ketones with methoxyamine
摘要:
beta-Methoxyaminoketones, derived from the addition of methoxyamine to 1,3-diaryl-2-propen-1-one, underwent base-induced beta-elimination to furnish the corresponding enaminoketones in good to moderate yields. The reaction conditions and substituents on the substrates significantly influenced the selectivity in the production of enaminoketone and/or aziridineketone. (C) 1998 Elsevier Science Ltd. All rights reserved.
l-Proline-catalyzed synthesis of highly functionalized multisubstituted 1,4-dihydropyridines
作者:Huanfeng Jiang、Ronghuan Mai、Hua Cao、Qiuhua Zhu、Xiaohang Liu
DOI:10.1039/b914659h
日期:——
Highlyfunctionalized multisubstituted 1,4-dihydropyridines 5 have been concisely synthesized in moderate to good yields viaL-proline-catalyzed one-pot multicomponentreactions (MCRs) of alkynoates or alkynones 1, amines 2, β-dicarbonyl compounds 3 and aldehydes 4 under mild conditions. The MCR process involves hydroamination/Knoevenagel condensation/Michael-type addition/intramolecular cyclization
I<sub>2</sub>‐DMSO‐Mediated Cascade Cyclization of <i>β</i>‐Ketosulfoxonium Ylides and <i>β</i>‐Enaminones: Synthesis of Quaternary‐Carbon‐Centered 2‐Hydroxy‐pyrrol‐3(2<i>H</i>)‐ones
作者:Rahul Kumar Saini、Paran J. Borpatra、Satyendra Kumar Pandey
DOI:10.1002/ejoc.202300693
日期:2023.10.2
A novel I2-DMSO-mediated cascade cyclization approach for the synthesis of 2-hydroxy-pyrrol-3(2H)-one scaffold from β-ketosulfoxonium ylides and β-enaminone derivatives has been described. This cascade transformation forms one C−C bond and one C−N bond in a single reaction vessel under metal-free and mild conditions, and adding an active hydroxyl group to a quaternary carbon center.
描述了一种新型 I 2 -DMSO 介导的级联环化方法,用于从β-酮亚磺鎓叶立德和β-烯胺酮衍生物合成 2-羟基-吡咯-3(2 H )-one 支架。这种级联转化在无金属且温和的条件下在单个反应容器中形成一个CC键和一个CN键,并向季碳中心添加一个活性羟基。
Surov, Igor; Lund, Henning, Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1986, vol. 40, # 10, p. 831 - 838