3‐disubstituted phthalides in good to high yields at ambienttemperature. In a similar manner, 3‐hydroxyisoindolin‐1‐one and 3‐hydroxyoxindole derivatives could also be easily prepared by direct reductive coupling of phthalimides and N‐substituted isatins with activated alkenes, respectively. Application of this methodology towards the synthesis of 1‐naphthol derivatives on a gram scale is also depicted
B(C6F5)3-catalyzed hydrosilylation of cyclicimides afforded an efficient synthetic method of pyrrolidines. In the presence of 5 mol% B(C6F5)3, various aromatic, aliphatic and polycyclic imides were smoothly reduced by PhSiH3 to generate the corresponding pyrrolidines in high yields. The reaction profiles monitored by 1H NMR spectroscopy disclosed the reduction process of cyclicimides and the effect of difference
B(C 6 F 5)3催化的环状酰亚胺的氢化硅烷化提供了吡咯烷的有效合成方法。在5mol%B(C 6 F 5)3的存在下,各种芳族,脂族和多环酰亚胺被PhSiH 3平滑还原,从而以高收率生成相应的吡咯烷。通过1 H NMR光谱监测的反应曲线揭示了环酰亚胺的还原过程以及氢化硅烷的不同结构对氢化硅烷化的影响。
[EN] PROFLUORESCENT NITROXIDE COMPOUNDS<br/>[FR] COMPOSÉS DE NITROXYDE PROFLUORESCENT
申请人:UNIV QUEENSLAND
公开号:WO2007124543A1
公开(公告)日:2007-11-08
[EN] A polymeric system which includes a polymeric material and a pro-fluorescent nitroxide compound or a fluorescent spin adduct thereof, the compound having at least one 5 to 10 membered heterocyclic ring comprising a nitroxide moiety or a fluorescent spin adduct thereof and an aryl or heteroaryl group fused therewith, wherein the compound includes at least one fluorophore; with the proviso that when the heterocyclic ring has 5 carbon atoms, the aryl group cannot be an unsubstituted phenanthrene. [FR] Un système polymérique comprenant un matériau polymérique et un composé de nitroxyde pro-fluorescent ou un de ses produits d'addition de spin fluorescent, le composé ayant au moins un noyau hétérocyclique de 5 à 10 éléments comportant une de ses fractions nitroxydes ou un de ses produits d'addition de spin et un groupe aryle ou hétéroaryle avec lesquels il se fond, le composé comprenant au moins un fluorophore; à condition que lorsque le noyau hétérocyclique comprend 5 atomes de carbone, le groupe aryle ne puisse pas être un phenanthrène non substitué.
Alkoxide-Catalyzed Hydrosilylation of Cyclic Imides to Isoquinolines via Tandem Reduction and Rearrangement
realized via tandem reduction and rearrangement. Using TMSOK as the catalyst and (EtO)2MeSiH as the reductant, a series of cyclic imides containing different functional groups were reduced to the corresponding 3-aryl isoquinolines in moderate to good yields. The scenario of the reaction pathway was supposed to involve the reduction of imides to ω-hydroxylactams, which underwent rearrangement in the presence
Intramolecular Formal [4 + 2] Cycloadditions: Synthesis of Spiro Isoindolinone Derivatives and Related Molecules
作者:Yarkali Krishna、Fujie Tanaka
DOI:10.1021/acs.orglett.1c00283
日期:2021.3.5
Acid-catalyzed intramolecular reactions of isoindolinone-derived hydroxylactam derivatives bearing enones or enals that afford spiro isoindolinone derivatives and related molecules have been developed. From the hydroxylactam moieties, N-acylenamides were generated in situ and reacted with the enone and the enal moieties via formal [4 + 2] cycloaddition reactions to construct cyclohexanone- and dihydropyran-fused