coupling and intramolecular amidation of 2-carboxybenzaldehyde and amines. This one-potsynthesis gives excellent yields using ultrathin Pt nanowires as catalysts under 1 bar of hydrogen. These unsupported catalysts can also be used for the synthesis of phthalazinones in high yield when hydrazine or phenyl hydrazine is used instead of amines.
Copper-promoted direct amidation of isoindolinone scaffolds by sodium persulfate
作者:Huifang Lai、Jiexin Xu、Jin Lin、Daijun Zha
DOI:10.1039/d1ob01054a
日期:——
We described a copper-promoted direct amidation of isoindolinone scaffolds mediated by sodium persulfate. The amides, including primary and secondary amides, can be installed on isoindolinones in moderate to excellent yields by this method.
Copper-Catalyzed sp<sup>3</sup> C–H Aminative Cyclization of 2-Alkyl-<i>N</i>-arylbenzamides: An Approach for the Synthesis of <i>N</i>-Aryl-isoindolinones
The synthesis of isoindolinones via copper-catalyzed sp(3) C-H functionalization of 2-alkyl-N-substituted benzamides is described. This process does not require the preparation of halogenated substitutes, expensive transition metals, or toxic Sn or CO gas. This method provides an efficient approach to generate various functionalized isoindolinones.
Palladium-catalyzed cycloaminocarbonylation of 2-aminomethyl- and 2-alkylcarbamoylaryl tosylates with CO
The palladium-catalyzed cycloaminocarbonylation of 2-(aminomethyl)aryl tosylates with CO has been established, by which a variety of salicylaldehyde derived 2-(aminomethyl)aryl tosylates may be cyclocarbonylated in the presence of CO, to afford the corresponding substituted isoindolinones in moderate to excellent yields. Furthermore, the method is also effective for the synthesis of isoindoline-1,3-diones and 2-alkyl-1H-benzo[e]isoindol-3(2H)-ones from 2-(N-alkylcarbamoyl)aryl tosylates and 1-(aminomethyl)naphthalene-2-yl tosylates, respectively. (C) 2015 Elsevier Ltd. All rights reserved.
Application of the Mild-Condition Phthalimidine Synthesis with Use of 1,2,3-1H-Benzotriazole and 2-Mercaptoethanol as Dual Synthetic Auxiliaries. Effective Synthesis of Phthalimidines Possessing a Variety of Substituents at 2-Position
The mild-condition phthalimidine synthesis based on Mannich type 1:1 condensation reaction between o-phthalaldehyde with a variety of primary amines in the presence of excess 2-mercaptoethanol and 1,2,3-1H-benzotriazole as "dual synthetic auxiliaries" in MeCN for 13 h at room temperature afford 2-substituted phthalimidines (2,3-dihydroisoindol-1-one) in fair to good isolated yields.